y-3y=15

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Solution for y-3y=15 equation: 



y-3y=15

We move all terms to the left:

y-3y-(15)=0

We add all the numbers together, and all the variables

-2y-15=0

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

-2y=15

y=15/-2

y=-7+1/2

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