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12x-18=6(x-1)
We move all terms to the left:
12x-18-(6(x-1))=0
We calculate terms in parentheses: -(6(x-1)), so:We get rid of parentheses
6(x-1)
We multiply parentheses
6x-6
Back to the equation:
-(6x-6)
12x-6x+6-18=0
We add all the numbers together, and all the variables
6x-12=0
We move all terms containing x to the left, all other terms to the right
6x=12
x=12/6
x=2
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