9=-b

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Solution for 9=-b equation: 



9=-b

We move all terms to the left:

9-(-b)=0

We add all the numbers together, and all the variables

-(-1b)+9=0

We get rid of parentheses

1b+9=0

We add all the numbers together, and all the variables

b+9=0

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

b=-9

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