(2y+21)=9y

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Solution for (2y+21)=9y equation: 



(2y+21)=9y

We move all terms to the left:

(2y+21)-(9y)=0

We add all the numbers together, and all the variables

-9y+(2y+21)=0

We get rid of parentheses

-9y+2y+21=0

We add all the numbers together, and all the variables

-7y+21=0

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

-7y=-21

y=-21/-7

y=+3

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