20=-6b-9b

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Solution for 20=-6b-9b equation: 



20=-6b-9b

We move all terms to the left:

20-(-6b-9b)=0

We add all the numbers together, and all the variables

-(-15b)+20=0

We get rid of parentheses

15b+20=0

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

15b=-20

b=-20/15

b=-1+1/3

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