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12x-27=8x+7
We move all terms to the left:
12x-27-(8x+7)=0
We get rid of parentheses
12x-8x-7-27=0
We add all the numbers together, and all the variables
4x-34=0
We move all terms containing x to the left, all other terms to the right
4x=34
x=34/4
x=8+1/2
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