-21=7(y-89)

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Solution for -21=7(y-89) equation: 



-21=7(y-89)

We move all terms to the left:

-21-(7(y-89))=0



We calculate terms in parentheses: -(7(y-89)), so:

7(y-89)

We multiply parentheses

7y-623

Back to the equation:

-(7y-623)



We get rid of parentheses

-7y+623-21=0

We add all the numbers together, and all the variables

-7y+602=0

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

-7y=-602

y=-602/-7

y=+86

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