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b-39+b=b+41
We move all terms to the left:
b-39+b-(b+41)=0
We add all the numbers together, and all the variables
2b-(b+41)-39=0
We get rid of parentheses
2b-b-41-39=0
We add all the numbers together, and all the variables
b-80=0
We move all terms containing b to the left, all other terms to the right
b=80
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