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-7+b/25=-1
We move all terms to the left:
-7+b/25-(-1)=0
We add all the numbers together, and all the variables
b/25-6=0
We multiply all the terms by the denominator
b-6*25=0
We add all the numbers together, and all the variables
b-150=0
We move all terms containing b to the left, all other terms to the right
b=150
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