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12=-2(-6x-3)
We move all terms to the left:
12-(-2(-6x-3))=0
We calculate terms in parentheses: -(-2(-6x-3)), so:We get rid of parentheses
-2(-6x-3)
We multiply parentheses
12x+6
Back to the equation:
-(12x+6)
-12x-6+12=0
We add all the numbers together, and all the variables
-12x+6=0
We move all terms containing x to the left, all other terms to the right
-12x=-6
x=-6/-12
x=1/2
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