20+4b=-20+9b

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Solution for 20+4b=-20+9b equation: 



20+4b=-20+9b

We move all terms to the left:

20+4b-(-20+9b)=0

We add all the numbers together, and all the variables

4b-(9b-20)+20=0

We get rid of parentheses

4b-9b+20+20=0

We add all the numbers together, and all the variables

-5b+40=0

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

-5b=-40

b=-40/-5

b=+8

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