9=-3-4b

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Solution for 9=-3-4b equation: 



9=-3-4b

We move all terms to the left:

9-(-3-4b)=0

We add all the numbers together, and all the variables

-(-4b-3)+9=0

We get rid of parentheses

4b+3+9=0

We add all the numbers together, and all the variables

4b+12=0

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

4b=-12

b=-12/4

b=-3

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