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-8(5x+7)+8(x+2)=56
We move all terms to the left:
-8(5x+7)+8(x+2)-(56)=0
We multiply parentheses
-40x+8x-56+16-56=0
We add all the numbers together, and all the variables
-32x-96=0
We move all terms containing x to the left, all other terms to the right
-32x=96
x=96/-32
x=-3
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