2b-9=-b-b

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



2b-9=-b-b

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

2b+2b-9=0

We add all the numbers together, and all the variables

4b-9=0

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

4b=9

b=9/4

b=2+1/4

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