-9=n-7

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Solution for -9=n-7 equation: 



-9=n-7

We move all terms to the left:

-9-(n-7)=0

We get rid of parentheses

-n+7-9=0

We add all the numbers together, and all the variables

-1n-2=0

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

-n=2

n=2/-1

n=-2

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