3y=y+90

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Solution for 3y=y+90 equation: 



3y=y+90

We move all terms to the left:

3y-(y+90)=0

We get rid of parentheses

3y-y-90=0

We add all the numbers together, and all the variables

2y-90=0

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

2y=90

y=90/2

y=45

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