-4b+9=-7b

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Solution for -4b+9=-7b equation: 



-4b+9=-7b

We move all terms to the left:

-4b+9-(-7b)=0

We get rid of parentheses

-4b+7b+9=0

We add all the numbers together, and all the variables

3b+9=0

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

3b=-9

b=-9/3

b=-3

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