2+8-7=y

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Solution for 2+8-7=y equation: 



2+8-7=y

We move all terms to the left:

2+8-7-(y)=0

We add all the numbers together, and all the variables

-1y+3=0

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

-y=-3

y=-3/-1

y=+3

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