9-8y=21-2y

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



9-8y=21-2y

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

-6y-12=0

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

-6y=12

y=12/-6

y=-2

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