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7+b/2=-1
We move all terms to the left:
7+b/2-(-1)=0
We add all the numbers together, and all the variables
b/2+8=0
We multiply all the terms by the denominator
b+8*2=0
We add all the numbers together, and all the variables
b+16=0
We move all terms containing b to the left, all other terms to the right
b=-16
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