-15=3y+9

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Solution for -15=3y+9 equation: 



-15=3y+9

We move all terms to the left:

-15-(3y+9)=0

We get rid of parentheses

-3y-9-15=0

We add all the numbers together, and all the variables

-3y-24=0

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

-3y=24

y=24/-3

y=-8

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