n+(-n)=3+18

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Solution for n+(-n)=3+18 equation: 



n+(-n)=3+18

We move all terms to the left:

n+(-n)-(3+18)=0

We add all the numbers together, and all the variables

n+(-1n)-21=0

We get rid of parentheses

n-1n-21=0

We add all the numbers together, and all the variables

-21!=0

There is no solution for this equation

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