-21-n=-8

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Solution for -21-n=-8 equation: 



-21-n=-8

We move all terms to the left:

-21-n-(-8)=0

We add all the numbers together, and all the variables

-1n-13=0

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

-n=13

n=13/-1

n=-13

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