3y+3=y-9

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



3y+3=y-9

We move all terms to the left:

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

We get rid of parentheses

3y-y+9+3=0

We add all the numbers together, and all the variables

2y+12=0

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

2y=-12

y=-12/2

y=-6

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