-y-9=18+2y

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Solution for -y-9=18+2y equation: 



-y-9=18+2y

We move all terms to the left:

-y-9-(18+2y)=0

We add all the numbers together, and all the variables

-y-(2y+18)-9=0

We add all the numbers together, and all the variables

-1y-(2y+18)-9=0

We get rid of parentheses

-1y-2y-18-9=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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