3b-b=84

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Solution for 3b-b=84 equation: 



3b-b=84

We move all terms to the left:

3b-b-(84)=0

We add all the numbers together, and all the variables

2b-84=0

We move all terms containing b to the left, all other terms to the right

2b=84

b=84/2

b=42

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