8y+21+2y=10y-15+2y

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Solution for 8y+21+2y=10y-15+2y equation: 



8y+21+2y=10y-15+2y

We move all terms to the left:

8y+21+2y-(10y-15+2y)=0

We add all the numbers together, and all the variables

8y+2y-(12y-15)+21=0

We add all the numbers together, and all the variables

10y-(12y-15)+21=0

We get rid of parentheses

10y-12y+15+21=0

We add all the numbers together, and all the variables

-2y+36=0

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

-2y=-36

y=-36/-2

y=+18

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