4=n+20

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Solution for 4=n+20 equation: 



4=n+20

We move all terms to the left:

4-(n+20)=0

We get rid of parentheses

-n-20+4=0

We add all the numbers together, and all the variables

-1n-16=0

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

-n=16

n=16/-1

n=-16

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