20-19b=-20-9b-15b

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Solution for 20-19b=-20-9b-15b equation: 



20-19b=-20-9b-15b

We move all terms to the left:

20-19b-(-20-9b-15b)=0

We add all the numbers together, and all the variables

-19b-(-24b-20)+20=0

We get rid of parentheses

-19b+24b+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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