y+y+y=18

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Solution for y+y+y=18 equation: 



y+y+y=18

We move all terms to the left:

y+y+y-(18)=0

We add all the numbers together, and all the variables

3y-18=0

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

3y=18

y=18/3

y=6

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