3+7b=84+4b

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Solution for 3+7b=84+4b equation: 



3+7b=84+4b

We move all terms to the left:

3+7b-(84+4b)=0

We add all the numbers together, and all the variables

7b-(4b+84)+3=0

We get rid of parentheses

7b-4b-84+3=0

We add all the numbers together, and all the variables

3b-81=0

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

3b=81

b=81/3

b=27

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