-9=8-y

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Solution for -9=8-y equation: 



-9=8-y

We move all terms to the left:

-9-(8-y)=0

We add all the numbers together, and all the variables

-(-1y+8)-9=0

We get rid of parentheses

1y-8-9=0

We add all the numbers together, and all the variables

y-17=0

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

y=17

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