8y+9=21-2y

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



8y+9=21-2y

We move all terms to the left:

8y+9-(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

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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