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39x-98=57x+15-12
We move all terms to the left:
39x-98-(57x+15-12)=0
We add all the numbers together, and all the variables
39x-(57x+3)-98=0
We get rid of parentheses
39x-57x-3-98=0
We add all the numbers together, and all the variables
-18x-101=0
We move all terms containing x to the left, all other terms to the right
-18x=101
x=101/-18
x=-5+11/18
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