15+3y=-12

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Solution for 15+3y=-12 equation: 



15+3y=-12

We move all terms to the left:

15+3y-(-12)=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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