-7-b+11b=9b-20

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Solution for -7-b+11b=9b-20 equation: 



-7-b+11b=9b-20

We move all terms to the left:

-7-b+11b-(9b-20)=0

We add all the numbers together, and all the variables

10b-(9b-20)-7=0

We get rid of parentheses

10b-9b+20-7=0

We add all the numbers together, and all the variables

b+13=0

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

b=-13

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