15=2y+y

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Solution for 15=2y+y equation: 



15=2y+y

We move all terms to the left:

15-(2y+y)=0

We add all the numbers together, and all the variables

-(+3y)+15=0

We get rid of parentheses

-3y+15=0

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

-3y=-15

y=-15/-3

y=+5

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