-21=n+6

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Solution for -21=n+6 equation: 



-21=n+6

We move all terms to the left:

-21-(n+6)=0

We get rid of parentheses

-n-6-21=0

We add all the numbers together, and all the variables

-1n-27=0

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

-n=27

n=27/-1

n=-27

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