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4x-12=-2(x+3)
We move all terms to the left:
4x-12-(-2(x+3))=0
We calculate terms in parentheses: -(-2(x+3)), so:We get rid of parentheses
-2(x+3)
We multiply parentheses
-2x-6
Back to the equation:
-(-2x-6)
4x+2x+6-12=0
We add all the numbers together, and all the variables
6x-6=0
We move all terms containing x to the left, all other terms to the right
6x=6
x=6/6
x=1
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