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88=x+-13
We move all terms to the left:
88-(x+-13)=0
We add all the numbers together, and all the variables
-(x-13)+88=0
We get rid of parentheses
-x+13+88=0
We add all the numbers together, and all the variables
-1x+101=0
We move all terms containing x to the left, all other terms to the right
-x=-101
x=-101/-1
x=+101
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