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-12-65=-7x
We move all terms to the left:
-12-65-(-7x)=0
We add all the numbers together, and all the variables
-(-7x)-77=0
We get rid of parentheses
7x-77=0
We move all terms containing x to the left, all other terms to the right
7x=77
x=77/7
x=11
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