3+4b=7b-18

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Solution for 3+4b=7b-18 equation: 



3+4b=7b-18

We move all terms to the left:

3+4b-(7b-18)=0

We get rid of parentheses

4b-7b+18+3=0

We add all the numbers together, and all the variables

-3b+21=0

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

-3b=-21

b=-21/-3

b=+7

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