-3b=-7-4b

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Solution for -3b=-7-4b equation: 



-3b=-7-4b

We move all terms to the left:

-3b-(-7-4b)=0

We add all the numbers together, and all the variables

-3b-(-4b-7)=0

We get rid of parentheses

-3b+4b+7=0

We add all the numbers together, and all the variables

b+7=0

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

b=-7

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