Y=3x+15=9

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Solution for Y=3x+15=9 equation: 



=3Y+15=9

We move all terms to the left:

-(3Y+15)=0

We get rid of parentheses

-3Y-15=0

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

-3Y=15

Y=15/-3

Y=-5

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