15=-3(4y-9)

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Solution for 15=-3(4y-9) equation: 



15=-3(4y-9)

We move all terms to the left:

15-(-3(4y-9))=0



We calculate terms in parentheses: -(-3(4y-9)), so:

-3(4y-9)

We multiply parentheses

-12y+27

Back to the equation:

-(-12y+27)



We get rid of parentheses

12y-27+15=0

We add all the numbers together, and all the variables

12y-12=0

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

12y=12

y=12/12

y=1

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