15-7y=57

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Solution for 15-7y=57 equation: 



15-7y=57

We move all terms to the left:

15-7y-(57)=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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