9=-2+b

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Solution for 9=-2+b equation: 



9=-2+b

We move all terms to the left:

9-(-2+b)=0

We add all the numbers together, and all the variables

-(b-2)+9=0

We get rid of parentheses

-b+2+9=0

We add all the numbers together, and all the variables

-1b+11=0

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

-b=-11

b=-11/-1

b=+11

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