15-9y=42

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Solution for 15-9y=42 equation: 



15-9y=42

We move all terms to the left:

15-9y-(42)=0

We add all the numbers together, and all the variables

-9y-27=0

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

-9y=27

y=27/-9

y=-3

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