9y-15=3(y-7)

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Solution for 9y-15=3(y-7) equation: 



9y-15=3(y-7)

We move all terms to the left:

9y-15-(3(y-7))=0



We calculate terms in parentheses: -(3(y-7)), so:

3(y-7)

We multiply parentheses

3y-21

Back to the equation:

-(3y-21)



We get rid of parentheses

9y-3y+21-15=0

We add all the numbers together, and all the variables

6y+6=0

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

6y=-6

y=-6/6

y=-1

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