-9y+3y=18

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Solution for -9y+3y=18 equation: 



-9y+3y=18

We move all terms to the left:

-9y+3y-(18)=0

We add all the numbers together, and all the variables

-6y-18=0

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

-6y=18

y=18/-6

y=-3

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