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simplifying expressions: 1. 2(3y+7)-10    2. 8-4(a+3)   3. 7b+10+3b-17  4.-4x-15+9x-12  5.6a-13-5a+15  6.3-5(x-7)  7.2(y-3)+5(y+4)   8.5a(b-7)-2(3a+4)  9. 4(x+5)-3x(y+3)  10. 7(b+2b)-3(b-5)  11.12(x-3)-7(2x+6x)

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• Posted on Mar 11, 2010 at 5:25:55PM
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Preview: ... 6a-13-5a+15 = 6a - 5a - 13 + 15 = a + 2 6.     3-5(x-7) = 3 - 5x + 35 = -5x + 38 7.      2(y-3)+5(y+4) = 2y - 6 + 5y + 20 ...

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Preview: ...  5.6a-13-5a+15= -a +2  6. 3-5(x-7) = 3 - 5x +35= -5x +38 7. 2(y-3)+5(y+4)= 2y-6+5y+20= 7y +14 = 7(x ...

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