15=3-3y

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Solution for 15=3-3y equation: 



15=3-3y

We move all terms to the left:

15-(3-3y)=0

We add all the numbers together, and all the variables

-(-3y+3)+15=0

We get rid of parentheses

3y-3+15=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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