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-2x-4(8x+20)=-12
We move all terms to the left:
-2x-4(8x+20)-(-12)=0
We add all the numbers together, and all the variables
-2x-4(8x+20)+12=0
We multiply parentheses
-2x-32x-80+12=0
We add all the numbers together, and all the variables
-34x-68=0
We move all terms containing x to the left, all other terms to the right
-34x=68
x=68/-34
x=-2
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