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4x+12=-2(x+6)
We move all terms to the left:
4x+12-(-2(x+6))=0
We calculate terms in parentheses: -(-2(x+6)), so:We get rid of parentheses
-2(x+6)
We multiply parentheses
-2x-12
Back to the equation:
-(-2x-12)
4x+2x+12+12=0
We add all the numbers together, and all the variables
6x+24=0
We move all terms containing x to the left, all other terms to the right
6x=-24
x=-24/6
x=-4
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