-9=15-2b

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Solution for -9=15-2b equation: 



-9=15-2b

We move all terms to the left:

-9-(15-2b)=0

We add all the numbers together, and all the variables

-(-2b+15)-9=0

We get rid of parentheses

2b-15-9=0

We add all the numbers together, and all the variables

2b-24=0

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

2b=24

b=24/2

b=12

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