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12=2(3x-3)
We move all terms to the left:
12-(2(3x-3))=0
We calculate terms in parentheses: -(2(3x-3)), so:We get rid of parentheses
2(3x-3)
We multiply parentheses
6x-6
Back to the equation:
-(6x-6)
-6x+6+12=0
We add all the numbers together, and all the variables
-6x+18=0
We move all terms containing x to the left, all other terms to the right
-6x=-18
x=-18/-6
x=+3
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