-421=n+78

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Solution for -421=n+78 equation: 



-421=n+78

We move all terms to the left:

-421-(n+78)=0

We get rid of parentheses

-n-78-421=0

We add all the numbers together, and all the variables

-1n-499=0

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

-n=499

n=499/-1

n=-499

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