-9=n+11

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Solution for -9=n+11 equation: 



-9=n+11

We move all terms to the left:

-9-(n+11)=0

We get rid of parentheses

-n-11-9=0

We add all the numbers together, and all the variables

-1n-20=0

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

-n=20

n=20/-1

n=-20

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