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6x+12=-3(2x+4)
We move all terms to the left:
6x+12-(-3(2x+4))=0
We calculate terms in parentheses: -(-3(2x+4)), so:We get rid of parentheses
-3(2x+4)
We multiply parentheses
-6x-12
Back to the equation:
-(-6x-12)
6x+6x+12+12=0
We add all the numbers together, and all the variables
12x+24=0
We move all terms containing x to the left, all other terms to the right
12x=-24
x=-24/12
x=-2
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