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-6(x-7)=12
We move all terms to the left:
-6(x-7)-(12)=0
We multiply parentheses
-6x+42-12=0
We add all the numbers together, and all the variables
-6x+30=0
We move all terms containing x to the left, all other terms to the right
-6x=-30
x=-30/-6
x=+5
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