-20=n-9

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Solution for -20=n-9 equation: 



-20=n-9

We move all terms to the left:

-20-(n-9)=0

We get rid of parentheses

-n+9-20=0

We add all the numbers together, and all the variables

-1n-11=0

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

-n=11

n=11/-1

n=-11

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