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4+b/9=1
We move all terms to the left:
4+b/9-(1)=0
We add all the numbers together, and all the variables
b/9+3=0
We multiply all the terms by the denominator
b+3*9=0
We add all the numbers together, and all the variables
b+27=0
We move all terms containing b to the left, all other terms to the right
b=-27
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