2y+y-3y+3y-y=18

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Solution for 2y+y-3y+3y-y=18 equation: 



2y+y-3y+3y-y=18

We move all terms to the left:

2y+y-3y+3y-y-(18)=0

We add all the numbers together, and all the variables

2y-18=0

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

2y=18

y=18/2

y=9

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