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$2.00 $2 to solve one problem... Solve the following system of linear equations.

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philthy
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Q:

Solve the following system of linear equations.

 

      |   2x + 4y = 42

    <

      |   2x + y = 18

 

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Preview: ... -----> 2x + 4y = 42 (-1)(2x + y = 18) -------------->  -2x - y = -18 ......................... ...
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Preview: ... Substitute y=8 into second equation to get 2x + 8 = 1 ...
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Preview: ... y - y = 42 - 18 3y = 24 divide both sides by 3 3y/3 = 24/3 y = 8 put this value in eq ...
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Preview: ... ute this into the first equation: 2x + 4(18 - 2x) = 42 Expand: 2x + 72 - ...
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Preview: ... is.. 4y=42-2x and then you want to rid of the 4 by the y .. so what you do is divide both 42 and 2x so this is what it ends up looking like..y= ...
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Solve system of linear equations
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Preview: ... -                2*(-4)+y=18 2x+4y=42              ...
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Elimination of Systems: ANSWER IN ONE MINUTE
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Preview: ... e it equal to zero) 3rd: Just add modified equation and unmodified equation to solve for one variable 4th: Plug in answer to one of original equatio ...
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Preview: ... 2x + y = 18 (2) ----------- ...
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Preview: ... = 42 ----------(1)    2x y = 18 -----------(2) ...
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Solution of 2x+4y=42 2x+y=18
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Preview: ... y value in Eq.(1) or in Eq.(2) From Eq.(2) 2x=18-y=18-8=1 ...
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Preview: ... t into 2x+4y=42   so now that you have substituted your new equation is 2((18-y)/2)+4y=42 focus on the first part ...
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Preview: ... (3) into (1) 2x + 4(18 - 2x) = 42 2x + 72 - 8x = 42 -6x + 72 ...
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Preview: ... implest equation, which is Equation 2. So we will work with that first and find the value of 'y'.   Therefore:  2x y = 18                  y = 18 - 2x    (I took the 2x to the other side of the equation, thus it becomes a minus   Now we wi ...
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Preview: ... I multiply or divide either equation one or two with a number so that atleast part of the two equations look identical? Lets observe the above equations. Can you notice that, if I we multiply the second equation with 2, then we get 2 s  8 t  = 12.  Great! Now, the 2 s  of this equation is the same as the  2 s  in the first equation! First step done! (Note: Multiplying an equation with a number such as 2 means that you multiply each element of the equation with 2. In this case it is 2 into s, 2 into t and 2 into 3. Remember, when you multiply with a positive number such as 2, the signs against each of the elements remain. When you multiply with a negative number such as -2, the signs against each of the elements reverse)  Step 2:  Now with the new equation from the previous step (2 s 8 t=12), and th ...
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Preview: ... |    2x + 4y = 42           |    2x + y = 18 The first thing you need to do is to subtract ...
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explanation and answer to system of equations problem: 2X=4Y=42, 2X+Y=18
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Preview: ... on: Y=18-2x      substitute the value of Y (18-2x) into the first equation then simplify: ...
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Solve the folowing linear equations, show your workings
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price is small but good resolution
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Preview: ... (2x+y)= 42-18. That will canc ...
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Preview: ... ;     2x + y = 18 If you set each equation equal to 0, you can subtract like values from each other. 2x + 4y -(42) = 42 - (42), Remember you can add or subtract the same value from each side to obtain a value of zero as the result. So , 2x + 4y -(42) = 42 - (42)      ;   2x + 4y - 42 = 0 And , 2x + y -(1 ...
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My answers are always the longest and the best-explained: Here, 1) Eliminate x, 2) solve for y, 3) solve for x :)
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Preview: ... either add or subtract all of equation 2 from equation 1. In this case, you SUBTRACT EQUATION 2 FROM EQUATION 1, so that the "2x"s will go away:   (2x + 4y = 42) - (2x + y  =  18) =        3y = 24. Step 2: Solve for "y". How do you get "y" by itself from ...
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Preview: ... UATION1 2X-2X+4Y-(+Y)=42-18 0+4Y-Y=2 ...
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Preview: ... 2 FROM EQUATION1 2X-2X+4Y-(+Y)=42-18 ...
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solution on your finger tips
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Preview: ... tions so we get 2x+4y=42 2x+ y=08 -    -     - ------------------ 0 - 3y=3 ...
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Its easy
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Preview: ... y  = 18  ------>Equation 2 we get, 2x - 8 = 18 2x = 18 + 8 2x = 26 x = 26 / 2 x = 13 The value of X and y were 13 and 8 . Hint: To check t ...
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i just need rating no need of money
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Preview: ... 2x+4y=42-------------(1) ...
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Ans with easy explaination
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Preview: ... -- I 2x + y = 18    -- II --- ...
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best answer
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Preview: ... 4y=42    ...
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Linear Equation
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Preview: ... )        2x + 4y = 42   and     2x + ...
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algebra
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correct solution with all the possible alternatives to solve the equation.
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Preview: ... ):    2x+y=18 =>2x+8=18 =>2x=10 =>x=5 Therefore,x=5 & y=8 is the required solution of this problem. Note: 1) Logic behind such problems:  Basically in such questions u have to find the value of x in terms of y or vice-versa from  first equation and put it in second e ...
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Solving your System of two Equations with two unknowns
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  • Posted on May. 10, 2010 at 01:57:15AM
Posted by :
zadocksmath
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Preview: ... the equation by negative one (-1) which will change the sign of each term to the opposite sign.  That is   (-1)( 2x + y = 18) which is equal to -2x - y = -18.  We then add the two equations as follows: 2x + 4y = 4 ...
The full tutorial is about 211 words long .
 
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Solution with step by step explanation. You may msg me for extra help.
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  • Posted on May. 14, 2010 at 11:47:15AM
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Zthun
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Preview: ... . Step 2.  To do this, we can either add or subtract the functions just like we would do normal numbers. Step 3.  Look at the equations above.  This is easy since we can see that 2x is in both equations.  So we will multipl ...
The full tutorial is about 226 words long .
 
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Solution In a descriptive manner and with very easy method...!
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  • Posted on May 14, 2010 at 5:33:53PM
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DariaKhan
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Preview: ...    -6x + 72 = 42       6x = 72 – 42       6x = 30       By applying cross section method we will take 6 to the other hand       x = 30/6       ...
The full tutorial is about 389 words long plus attachments.

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linear equations
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  • Posted on May 18, 2010 at 7:34:26PM
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thakur018
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Preview: ...                eq n2-----2X+ Y=18 Subtracting eq 2 from eq 1, we will ...
The full tutorial is about 45 words long .
 
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Simplest way
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  • Posted on May. 19, 2010 at 12:20:03AM
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AbheyR
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Preview: ... eck a ...
The full tutorial is about 4 words long plus attachments.

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the best answer
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  • Posted on May. 20, 2010 at 09:08:01AM
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StarChen
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Preview: ... x+y)=42-18;  2x+4y-2x-y=24;  ...
The full tutorial is about 13 words long .
 
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perfect step by step solution
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  • Posted on May 20, 2010 at 5:19:00PM
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sasmitastar1
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Preview: ... your ans ...
The full tutorial is about 7 words long plus attachments.

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Solution with The Fastest Method...
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  • Posted on May 22, 2010 at 7:01:10PM
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Tavoularis
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Preview: ... 18 -------------------------        => 0 + 3y = 24        => y = 24/3        ...
The full tutorial is about 99 words long .
 
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Best solution, the answer is (x,y)=(5,8)
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  • Posted on May 22, 2010 at 7:03:23PM
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Tavoularis
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Preview: ... e second equation and replace the "y" with "8"         2x + y = 18     => 2x + ...
The full tutorial is about 99 words long .
 
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easiest solution
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  • Posted on May. 24, 2010 at 07:47:37AM
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angel28
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Preview: ... y = 18                                    ...
The full tutorial is about 51 words long plus attachments.

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simple solution for this
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  • Posted on May. 25, 2010 at 09:34:48AM
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kawardha42
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Preview: ... e better ...
The full tutorial is about 7 words long plus attachments.

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here is the work for you,absolutly correct!
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  • Posted on May. 31, 2010 at 12:15:56AM
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janemark
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Preview: ... please see the a ...
The full tutorial is about 13 words long plus attachments.

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simple
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  • Posted on Jun 04, 2010 at 3:01:36PM
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DeiuAJ
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Preview: ... = 18 -y ( both equal with 2x) so 42 ...
The full tutorial is about 36 words long .
 
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easy linear
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  • Posted on Jun 06, 2010 at 1:16:05PM
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mathman2522
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Preview: ... --->> -6x = 42 - 72 ---------------------------> -6x = -30 --------------------------> x = -30/ -6 -------------------------------- ...
The full tutorial is about 99 words long .
 
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solved
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  • Posted on Jun. 08, 2010 at 12:05:04AM
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vespa300
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Preview: ...       |    2x + 4y ...
The full tutorial is about 25 words long .
 
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Another way to do it
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  • Posted on Jun. 12, 2010 at 12:14:21AM
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sippy
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Preview: ... o get rid of a term:           2x + 4y = 42       - ...
The full tutorial is about 55 words long .
 
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what do do..solve for one or the other
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  • Posted on Jun 25, 2010 at 6:58:20PM
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wiizzkid55
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Preview: ... elf by dividing the complete other side by 2   x=(18-y)/2     now your ready to plug it in     2x+4y=42   plug in for x the answer you ...
The full tutorial is about 85 words long .
 
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SOLUTION IS STEP WISE GIVEN TO YOU
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  • Posted on Jun. 30, 2010 at 04:48:09AM
Posted by :
shreyanshm
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Preview: ... 2(21-2Y)+Y=18 42-4Y+Y=18 42-3Y=18 -3Y=18-42 -3Y ...
The full tutorial is about 22 words long .
 
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GREAT WORK FOR YOU!
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  • Posted on Jul. 01, 2010 at 12:36:13AM
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janemark
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Preview: ... 4y-(2x+y)=42-18 =>3y=24 = ...
The full tutorial is about 6 words long .
 
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solutions for you
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  • Posted on Jul. 01, 2010 at 10:45:35AM
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deepankar
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Preview: ... is very simple a ...
The full tutorial is about 15 words long plus attachments.

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Solve easily
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  • Posted on Jul. 10, 2010 at 09:15:20AM
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pandu104
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Preview: ... times x and 4 times of y gives 42, and in ...
The full tutorial is about 49 words long .
 
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Solve system of linear equations
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  • Posted on Jul 18, 2010 at 4:07:07PM
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TheBrain7
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Preview: ... (-1)           -2x - y = -18            -2x - y = -18   3y = 24               ...
The full tutorial is about 77 words long .
 
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Answer
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  • Posted on Jul. 26, 2010 at 03:17:00AM
Posted by :
wangxiaokun
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Preview: ... nd number them (equation (1) and equation (2) ) 2x+4y=42  (1) 2x+y=18  (2) we can see that both ...
The full tutorial is about 73 words long .
 
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high solution
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  • Posted on Jul. 29, 2010 at 04:20:40AM
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chandan
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Preview: ... two equation 3y=24 y=24/3 ...
The full tutorial is about 9 words long .
 
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Answer your question
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  • Posted on Aug 01, 2010 at 6:55:12PM
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abdeljaber
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Preview: ... +y=18          2x+8=18          2 ...
The full tutorial is about 18 words long .
 
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Step by Step Solution
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  • Posted on Aug. 03, 2010 at 04:51:43AM
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pchandgothia
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A:
Preview: ... => 2x + 4y -2x - y = 24 => ...
The full tutorial is about 32 words long .
 
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the answer for u
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  • Posted on Aug. 04, 2010 at 05:33:25AM
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Hoangduchuy
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Preview: ... -18= 24 => y=8 ...
The full tutorial is about 15 words long .
 
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to easy in learn
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  • Posted on Aug. 05, 2010 at 09:48:48AM
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kaushal
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Preview: ... = 21 x + 2y= 21 2x + y =18  so 3x + 3y = 39 de ...
The full tutorial is about 68 words long .
 
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Simultanous equation solved
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  • Posted on Aug. 06, 2010 at 06:17:21AM
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snkdbpc
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Preview: ... equations Let 2x+4y=42 be eq 1 and 2x+y=18 be eq 2 ...
The full tutorial is about 39 words long .
 
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Solution of Problem
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  • Posted on Aug. 06, 2010 at 09:00:57AM
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jaskaran
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Preview: ... 8   (2) Subtracting (2) from (1) we get ...
The full tutorial is about 48 words long .
 
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Solution to the linear equation
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  • Posted on Aug. 06, 2010 at 11:38:54AM
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jennimathers
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A:
Preview: ... 2x+ y=18 ...........Equation no (2) Subtract equation (2) from equation (1) which gi ...
The full tutorial is about 65 words long .
 
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Answer and explications
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  • Posted on Aug 08, 2010 at 3:08:09PM
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andreislnt
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A:
Preview: ... -------             3y = 24; => y=24/3; y=8 We got y, so we substitu ...
The full tutorial is about 62 words long .
 
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Here are the two Linear Equations you needed! A++
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  • Posted on Aug. 09, 2010 at 02:20:37AM
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stevensfamily004
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A:
Preview: ... Thanks and let me know if ...
The full tutorial is about 22 words long plus attachments.

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Problem
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  • Posted on Aug 09, 2010 at 6:13:28PM
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darkangel20
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Preview: ... u l ...
The full tutorial is about 5 words long plus attachments.

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Resolved by substitution, step by step. preview please:)
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  • Posted on Aug. 12, 2010 at 04:38:57AM
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Maquin
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Preview: ... e substitution method is the simplest to solve this system: Method: Replacement First, from Equation 2, solve for the and stay ...
The full tutorial is about 133 words long .
 
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simple yet ......
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  • Posted on Aug. 15, 2010 at 07:03:16AM
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hunter89
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Preview: ... most any linear equation in two variables first : analyse the equations -  2x + 4y = 32 ;assign coefficients as  x 1=2, y 1=4, c 1=42 similarly for second equation x 2=2, y 2=1, c 2=18 second : try to equat ...
The full tutorial is about 176 words long .
 
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simple and best solution
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  • Posted on Aug 19, 2010 at 2:17:15PM
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Ranjit15
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A:
Preview: ... =42.......1 2x+y=18...... ...
The full tutorial is about 6 words long .
 
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Best Answer
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  • Posted on Aug 21, 2010 at 1:10:00PM
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gharsh2006
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Preview: ... 2(21-2y)+y=18 42-4y+y=18 ...
The full tutorial is about 9 words long .
 
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Answer
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  • Posted on Aug 21, 2010 at 10:25:35PM
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Safinm214
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A:
Preview: ... 2x+y=18   + _ ...
The full tutorial is about 4 words long .
 
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Working
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  • Posted on Aug 27, 2010 at 12:09:51PM
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ajf
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A:
Preview: ... 18-y 3y=24 y=8 ...
The full tutorial is about 3 words long .
 
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answer to your question
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  • Posted on Aug 28, 2010 at 1:42:38PM
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williamhua98
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A:
Preview: ... es. so   2x+4y=42 - (2x+y= ...
The full tutorial is about 13 words long .
 
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solved
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  • Posted on Aug. 31, 2010 at 04:35:11AM
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prats
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A:
Preview: ... s x=5 ...
The full tutorial is about 7 words long .
 
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Linear Equations
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  • Posted on Sep. 02, 2010 at 01:38:15AM
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haleysred
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A:
Preview: ... vide both sides by 3:                                Now, you can plug this value into one of the original equations in order to solve for x:                                     ...
The full tutorial is about 74 words long .
 
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These are known as SIMULTANIOUS EQUATIONS
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  • Posted on Sep. 04, 2010 at 10:00:10AM
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Sachirox
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Preview: ... nown value equal. But IN this case X values are equal (2x and 2x) Then since the co-e ...
The full tutorial is about 101 words long .
 
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Solving X and Y
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  • Posted on Sep 06, 2010 at 3:24:27PM
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jodiepody
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A:
Preview: ...                y    =  8   so then you can work out x...       2x  +   y  =  18      add the v ...
The full tutorial is about 87 words long .
 
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two "2 line methods" of solving the tutorial
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  • Posted on Sep. 07, 2010 at 05:14:59AM
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punyaluthra
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A:
Preview: ... ations and get x Method 2: Put either one of the variables in the eq ...
The full tutorial is about 75 words long .
 
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maths
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  • Posted on Sep. 08, 2010 at 09:54:05AM
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rishamdeep25
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A:
Preview: ... th problm ...
The full tutorial is about 11 words long plus attachments.

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Attached is a solution to your problem and a full step by step solution how it the answer was derived.
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  • Posted on Sep 08, 2010 at 11:05:19PM
Posted by :
mreinstein
 
A:
Preview: ... ow solve for y using eqn 4 by dividing the whole equation by 3. (3y = 24) / 3 y = 8 -->  value of y   4.     Now substitute y on either eqn 1 ...
The full tutorial is about 162 words long .
  • This tutorial has appended information.
 
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system of linear equations
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  • Posted on Sep. 13, 2010 at 12:31:16AM
Posted by :
yousra
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A:
Preview: ...   x = 21 - 2y   2x + y = 18 2( ...
The full tutorial is about 56 words long .
 
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The Solution Includes A Secret ;)
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  • Posted on Sep 18, 2010 at 3:06:43PM
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blueidea
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A:
Preview: ... - 2*x y = 18 - 2*5 y=8   To easily solve this proble ...
The full tutorial is about 47 words long .
 
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How to solve a linear equations.
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  • Posted on Sep 20, 2010 at 10:28:30PM
Posted by :
randizzle1055
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A:
Preview: ...        3y = 24        3y/3 = 24/3   ...
The full tutorial is about 45 words long .
 
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Solve the Linear Equation
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  • Posted on Sep 21, 2010 at 11:11:48PM
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sarahlee
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A:
Preview: ... 42 Working: x 4y= 42 Equation #2: 2 x y= 18 Working: x y= 18 ...
The full tutorial is about 65 words long .
 
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Solve the following system of linear equations."
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  • Posted on Sep 25, 2010 at 3:06:43PM
Posted by :
henrythetutor
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A:
Preview: ... le (a) 2x + 4 (y=8) = 42 or 2x + 4(8) = 42 2x + 32 = 42 2x + 32 -32 = 42-32 2x = 10 (2/2)x = (10/2) ...
The full tutorial is about 106 words long .
 
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Short solution!
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  • Posted on Sep 25, 2010 at 3:09:38PM
Posted by :
ngocthanhcn
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A:
Preview: ... 2x+y=18 (2) (1) - ...
The full tutorial is about 21 words long .
 
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step wise method to solve this problem and also general step wise algorithm to solve other similar problems
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  • Posted on Sep. 26, 2010 at 05:13:32AM
Posted by :
vips
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A:
Preview: ... 1st equation 2x 4y=42 2x=42-4y x =(42-4y)/2 step2 :put this value of variable (in our example x) i ...
The full tutorial is about 65 words long .
 
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system of equations
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  • Posted on Sep 28, 2010 at 2:00:03PM
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ali1ali2ali3
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A:
Preview: ... 4y= 42 ...
The full tutorial is about 4 words long .
 
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Answer to equation
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  • Posted on Oct 01, 2010 at 7:35:36PM
Posted by :
jadea
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A:
Preview: ... ----(equation 3) -2x - y = -18 ------(equation 4)       3y = ...
The full tutorial is about 64 words long .
 
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linear equation
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  • Posted on Oct. 02, 2010 at 01:46:13AM
Posted by :
ashwin1590
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Preview: ... ation (1)-(2); 2x+4y=42 - 2x+y=18 = 3y= ...
The full tutorial is about 21 words long .
 
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Method to solve system of linear equations
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  • Posted on Oct 02, 2010 at 6:37:55PM
Posted by :
nandu
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Preview: ... y=18-2x           2x is taken to the Right Hand Side(RHS).a negative sign is given during the process.thus             RHS is (18-2x)  Step 2:second equation is 2x+4y=42           we fo ...
The full tutorial is about 164 words long .
 
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this is the detail solution
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  • Posted on Oct 03, 2010 at 2:33:30PM
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duttasir
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Preview: ... 2-3y - 42 =18-42 => -3y =-24 =>  3y=24 =>  3y/3=24/3 => ...
The full tutorial is about 57 words long .
 
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3 full step by step complete vays to get to the answer.
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  • Posted on Oct. 12, 2010 at 12:52:25AM
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nazimb
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Preview: ... on and it consists of finding the value of the first variable and substitute it in the second equation: 2x+4y=42 2x=42-4y x=(42-4y)/2 x=21-2y   Now, we substitute x into the equation: 2x+y=18 2(21-2y)+y=18 42-4y+y=18 42-3y=18 42-42-3y=18-42 -3y=-24 y=-24/-3 ...
The full tutorial is about 154 words long plus attachments.

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Algebra Problem Solution
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  • Posted on Oct 12, 2010 at 1:19:17PM
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MarkMooney
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Preview: ... by itself.... y=18-2x Since we have what Y equals in each, set them equal to each other....   10.5-.5x=18-2x  add 2x to both sides, ...
The full tutorial is about 96 words long .
 
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subtracting equation (ii) from (i), dividind both sides by three, using equation (a) in equation (ii), subtracting 8 fro
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  • Posted on Oct. 14, 2010 at 02:02:23AM
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ishtiaq
 
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Preview: ... ides by three => y = 8.........(a) using equation (a) in equation (ii) => ...
The full tutorial is about 53 words long .
 
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| 2x + 4y = 42 < | 2x + y = 18
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  • Posted on Oct. 19, 2010 at 10:51:12AM
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soluckygirl
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Preview: ... y = ...
The full tutorial is about 185 words long .
 
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answers
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  • Posted on Oct. 24, 2010 at 11:24:39AM
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smartguy1128
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Preview: ... so it will become y=21/2-1/2x..this is your first equation then substitute the first equation  to 2x+y-18 so it will become 2x+(21/ ...
The full tutorial is about 104 words long .
 
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answer to this Linear Equation
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  • Posted on Oct. 29, 2010 at 10:14:19AM
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hmk
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Preview: ... oth equations.  = 3y = 24 Y= 8 Then put the value of Y in to eq. (2) to find the value of X 2x + 8 = 18 2x = 18 – 8 X = 10/2 X = 5 2x + 4y = ...
The full tutorial is about 154 words long plus attachments.

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subtract equation2 from equation1
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  • Posted on Nov 05, 2010 at 2:17:58PM
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eueyw
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Preview: ... , then in equation2  replace y w ...
The full tutorial is about 27 words long plus attachments.

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The solution
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  • Posted on Nov. 07, 2010 at 07:43:43AM
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MihaiPantiru
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Preview: ... o y = 8.  Then replace y in the second eq ...
The full tutorial is about 45 words long .
 
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This must help you
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  • Posted on Nov. 27, 2010 at 02:30:19AM
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nmimbo
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Preview: ... 4y =42 -2x -y =-18 _____________ 0x+3y = 24 hence, ...
The full tutorial is about 44 words long .
 
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Complete solution(best help)
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  • Posted on Dec. 02, 2010 at 07:47:03AM
Posted by :
mathshub
 
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Preview: ... r :-   2x + 4y = 42 .............eq(1)                 2x + y = 18 .........eq(2)            ...
The full tutorial is about 51 words long .
 
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RLBL Solution
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  • Posted on Dec 04, 2010 at 2:47:55PM
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RobertLBLewis
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Preview: ...   |  2x + y = 18 2x + 4y = 42  |  y = 18 - 2x Substitute 18 - 2x for y for the equation on the left 2x + 4(18 - 2x) = 42  Simplify 2x + 72 - 8x = 42 Add ...
The full tutorial is about 184 words long .
 
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complete explaination answer
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  • Posted on Dec 12, 2010 at 1:45:18PM
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qazrex
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Preview: ... ) 2x +  y = 18        equation ( II ) Now subtracting equation ( II ) from ( I ) 2x ...
The full tutorial is about 78 words long .
 
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THE BEST ASNWER
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  • Posted on Dec. 27, 2010 at 02:43:41AM
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mynabeel
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Preview: ... 8 on y , because in the first step we have find the value of y = 8 2x + y  = 18 2x + 8  = 18             2x    =   18 – 8   ...
The full tutorial is about 111 words long plus attachments.

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Solution for x and y
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  • Posted on Jan. 17, 2011 at 02:51:28AM
Posted by :
sanabapa
 
A:
Preview: ... (2x+4y)-(2x+y)=42-18 3y=24 y=24/3=8 put the v ...
The full tutorial is about 23 words long .