-21=3(y-6)

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Solution for -21=3(y-6) equation: 



-21=3(y-6)

We move all terms to the left:

-21-(3(y-6))=0



We calculate terms in parentheses: -(3(y-6)), so:

3(y-6)

We multiply parentheses

3y-18

Back to the equation:

-(3y-18)



We get rid of parentheses

-3y+18-21=0

We add all the numbers together, and all the variables

-3y-3=0

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

-3y=3

y=3/-3

y=-1

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