-3y=3+9

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Solution for -3y=3+9 equation: 



-3y=3+9

We move all terms to the left:

-3y-(3+9)=0

We add all the numbers together, and all the variables

-3y-12=0

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

-3y=12

y=12/-3

y=-4

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