-9y-21=-5(y+9)

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Solution for -9y-21=-5(y+9) equation: 



-9y-21=-5(y+9)

We move all terms to the left:

-9y-21-(-5(y+9))=0



We calculate terms in parentheses: -(-5(y+9)), so:

-5(y+9)

We multiply parentheses

-5y-45

Back to the equation:

-(-5y-45)



We get rid of parentheses

-9y+5y+45-21=0

We add all the numbers together, and all the variables

-4y+24=0

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

-4y=-24

y=-24/-4

y=+6

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