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12=6(x-7)*
We move all terms to the left:
12-(6(x-7)*)=0
We calculate terms in parentheses: -(6(x-7)*), so:We get rid of parentheses
6(x-7)*
We multiply parentheses
6x-42
Back to the equation:
-(6x-42)
-6x+42+12=0
We add all the numbers together, and all the variables
-6x+54=0
We move all terms containing x to the left, all other terms to the right
-6x=-54
x=-54/-6
x=+9
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