-3b-9b-7=9-10b

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Solution for -3b-9b-7=9-10b equation: 



-3b-9b-7=9-10b

We move all terms to the left:

-3b-9b-7-(9-10b)=0

We add all the numbers together, and all the variables

-3b-9b-(-10b+9)-7=0

We add all the numbers together, and all the variables

-12b-(-10b+9)-7=0

We get rid of parentheses

-12b+10b-9-7=0

We add all the numbers together, and all the variables

-2b-16=0

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

-2b=16

b=16/-2

b=-8

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