-9b+20b=-11

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Solution for -9b+20b=-11 equation: 



-9b+20b=-11

We move all terms to the left:

-9b+20b-(-11)=0

We add all the numbers together, and all the variables

11b+11=0

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

11b=-11

b=-11/11

b=-1

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