9=y+3y

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Solution for 9=y+3y equation: 



9=y+3y

We move all terms to the left:

9-(y+3y)=0

We add all the numbers together, and all the variables

-(+4y)+9=0

We get rid of parentheses

-4y+9=0

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

-4y=-9

y=-9/-4

y=2+1/4

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