8y-7=15y+21

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Solution for 8y-7=15y+21 equation: 



8y-7=15y+21

We move all terms to the left:

8y-7-(15y+21)=0

We get rid of parentheses

8y-15y-21-7=0

We add all the numbers together, and all the variables

-7y-28=0

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

-7y=28

y=28/-7

y=-4

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