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12=-4(-4x-3)
We move all terms to the left:
12-(-4(-4x-3))=0
We calculate terms in parentheses: -(-4(-4x-3)), so:We get rid of parentheses
-4(-4x-3)
We multiply parentheses
16x+12
Back to the equation:
-(16x+12)
-16x-12+12=0
We add all the numbers together, and all the variables
-16x=0
x=0/-16
x=0
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