21=n+16

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Solution for 21=n+16 equation: 



21=n+16

We move all terms to the left:

21-(n+16)=0

We get rid of parentheses

-n-16+21=0

We add all the numbers together, and all the variables

-1n+5=0

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

-n=-5

n=-5/-1

n=+5

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