2y=5y-21

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Solution for 2y=5y-21 equation: 



2y=5y-21

We move all terms to the left:

2y-(5y-21)=0

We get rid of parentheses

2y-5y+21=0

We add all the numbers together, and all the variables

-3y+21=0

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

-3y=-21

y=-21/-3

y=+7

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