-27=15+7y

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Solution for -27=15+7y equation: 



-27=15+7y

We move all terms to the left:

-27-(15+7y)=0

We add all the numbers together, and all the variables

-(7y+15)-27=0

We get rid of parentheses

-7y-15-27=0

We add all the numbers together, and all the variables

-7y-42=0

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

-7y=42

y=42/-7

y=-6

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