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9+b/7=7
We move all terms to the left:
9+b/7-(7)=0
We add all the numbers together, and all the variables
b/7+2=0
We multiply all the terms by the denominator
b+2*7=0
We add all the numbers together, and all the variables
b+14=0
We move all terms containing b to the left, all other terms to the right
b=-14
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