-27=21-8y

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Solution for -27=21-8y equation: 



-27=21-8y

We move all terms to the left:

-27-(21-8y)=0

We add all the numbers together, and all the variables

-(-8y+21)-27=0

We get rid of parentheses

8y-21-27=0

We add all the numbers together, and all the variables

8y-48=0

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

8y=48

y=48/8

y=6

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