7=-y+3y

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Solution for 7=-y+3y equation: 



7=-y+3y

We move all terms to the left:

7-(-y+3y)=0

We add all the numbers together, and all the variables

-(+2y)+7=0

We get rid of parentheses

-2y+7=0

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

-2y=-7

y=-7/-2

y=3+1/2

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