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3x-12=6(x-12)
We move all terms to the left:
3x-12-(6(x-12))=0
We calculate terms in parentheses: -(6(x-12)), so:We get rid of parentheses
6(x-12)
We multiply parentheses
6x-72
Back to the equation:
-(6x-72)
3x-6x+72-12=0
We add all the numbers together, and all the variables
-3x+60=0
We move all terms containing x to the left, all other terms to the right
-3x=-60
x=-60/-3
x=+20
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