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-12+b/8=13
We move all terms to the left:
-12+b/8-(13)=0
We add all the numbers together, and all the variables
b/8-25=0
We multiply all the terms by the denominator
b-25*8=0
We add all the numbers together, and all the variables
b-200=0
We move all terms containing b to the left, all other terms to the right
b=200
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