-2y+9=8y+21

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Solution for -2y+9=8y+21 equation: 



-2y+9=8y+21

We move all terms to the left:

-2y+9-(8y+21)=0

We get rid of parentheses

-2y-8y-21+9=0

We add all the numbers together, and all the variables

-10y-12=0

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

-10y=12

y=12/-10

y=-1+1/5

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