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

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Solution for 7(b+3)=-(b-4) equation: 



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

We move all terms to the left:

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

We multiply parentheses

7b-(-(b-4))+21=0



We calculate terms in parentheses: -(-(b-4)), so:

-(b-4)

We get rid of parentheses

-b+4

We add all the numbers together, and all the variables

-1b+4

Back to the equation:

-(-1b+4)



We get rid of parentheses

7b+1b-4+21=0

We add all the numbers together, and all the variables

8b+17=0

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

8b=-17

b=-17/8

b=-2+1/8

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