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-7x-12=2x+3(4x-4)
We move all terms to the left:
-7x-12-(2x+3(4x-4))=0
We calculate terms in parentheses: -(2x+3(4x-4)), so:We get rid of parentheses
2x+3(4x-4)
We multiply parentheses
2x+12x-12
We add all the numbers together, and all the variables
14x-12
Back to the equation:
-(14x-12)
-7x-14x+12-12=0
We add all the numbers together, and all the variables
-21x=0
x=0/-21
x=0
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