3b-39=78

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Solution for 3b-39=78 equation: 



3b-39=78

We move all terms to the left:

3b-39-(78)=0

We add all the numbers together, and all the variables

3b-117=0

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

3b=117

b=117/3

b=39

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