-9=-5b+2b

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Solution for -9=-5b+2b equation: 



-9=-5b+2b

We move all terms to the left:

-9-(-5b+2b)=0

We add all the numbers together, and all the variables

-(-3b)-9=0

We get rid of parentheses

3b-9=0

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

3b=9

b=9/3

b=3

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