-21=7(y+4)

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Solution for -21=7(y+4) equation: 



-21=7(y+4)

We move all terms to the left:

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



We calculate terms in parentheses: -(7(y+4)), so:

7(y+4)

We multiply parentheses

7y+28

Back to the equation:

-(7y+28)



We get rid of parentheses

-7y-28-21=0

We add all the numbers together, and all the variables

-7y-49=0

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

-7y=49

y=49/-7

y=-7

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