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b/8-18=13
We move all terms to the left:
b/8-18-(13)=0
We add all the numbers together, and all the variables
b/8-31=0
We multiply all the terms by the denominator
b-31*8=0
We add all the numbers together, and all the variables
b-248=0
We move all terms containing b to the left, all other terms to the right
b=248
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