-2=7+b

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Solution for -2=7+b equation: 



-2=7+b

We move all terms to the left:

-2-(7+b)=0

We add all the numbers together, and all the variables

-(b+7)-2=0

We get rid of parentheses

-b-7-2=0

We add all the numbers together, and all the variables

-1b-9=0

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

-b=9

b=9/-1

b=-9

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