-9b-12b-9=11-17b

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Solution for -9b-12b-9=11-17b equation: 



-9b-12b-9=11-17b

We move all terms to the left:

-9b-12b-9-(11-17b)=0

We add all the numbers together, and all the variables

-9b-12b-(-17b+11)-9=0

We add all the numbers together, and all the variables

-21b-(-17b+11)-9=0

We get rid of parentheses

-21b+17b-11-9=0

We add all the numbers together, and all the variables

-4b-20=0

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

-4b=20

b=20/-4

b=-5

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