-9+21=-6(y-5)

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Solution for -9+21=-6(y-5) equation: 



-9+21=-6(y-5)

We move all terms to the left:

-9+21-(-6(y-5))=0

We add all the numbers together, and all the variables

-(-6(y-5))+12=0



We calculate terms in parentheses: -(-6(y-5)), so:

-6(y-5)

We multiply parentheses

-6y+30

Back to the equation:

-(-6y+30)



We get rid of parentheses

6y-30+12=0

We add all the numbers together, and all the variables

6y-18=0

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

6y=18

y=18/6

y=3

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