18=3y-9

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Solution for 18=3y-9 equation: 



18=3y-9

We move all terms to the left:

18-(3y-9)=0

We get rid of parentheses

-3y+9+18=0

We add all the numbers together, and all the variables

-3y+27=0

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

-3y=-27

y=-27/-3

y=+9

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