7b+20=-20+9b

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Solution for 7b+20=-20+9b equation: 



7b+20=-20+9b

We move all terms to the left:

7b+20-(-20+9b)=0

We add all the numbers together, and all the variables

7b-(9b-20)+20=0

We get rid of parentheses

7b-9b+20+20=0

We add all the numbers together, and all the variables

-2b+40=0

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

-2b=-40

b=-40/-2

b=+20

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