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b/7-9=-2
We move all terms to the left:
b/7-9-(-2)=0
We add all the numbers together, and all the variables
b/7-7=0
We multiply all the terms by the denominator
b-7*7=0
We add all the numbers together, and all the variables
b-49=0
We move all terms containing b to the left, all other terms to the right
b=49
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