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18=2(6x+3)
We move all terms to the left:
18-(2(6x+3))=0
We calculate terms in parentheses: -(2(6x+3)), so:We get rid of parentheses
2(6x+3)
We multiply parentheses
12x+6
Back to the equation:
-(12x+6)
-12x-6+18=0
We add all the numbers together, and all the variables
-12x+12=0
We move all terms containing x to the left, all other terms to the right
-12x=-12
x=-12/-12
x=1
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