b+20=2b-18

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Solution for b+20=2b-18 equation: 



b+20=2b-18

We move all terms to the left:

b+20-(2b-18)=0

We get rid of parentheses

b-2b+18+20=0

We add all the numbers together, and all the variables

-1b+38=0

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

-b=-38

b=-38/-1

b=+38

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