-6=-21-n

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Solution for -6=-21-n equation: 



-6=-21-n

We move all terms to the left:

-6-(-21-n)=0

We add all the numbers together, and all the variables

-(-1n-21)-6=0

We get rid of parentheses

1n+21-6=0

We add all the numbers together, and all the variables

n+15=0

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

n=-15

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