-2b+9=-7-b+3b

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Solution for -2b+9=-7-b+3b equation: 



-2b+9=-7-b+3b

We move all terms to the left:

-2b+9-(-7-b+3b)=0

We add all the numbers together, and all the variables

-2b-(2b-7)+9=0

We get rid of parentheses

-2b-2b+7+9=0

We add all the numbers together, and all the variables

-4b+16=0

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

-4b=-16

b=-16/-4

b=+4

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