21=5-3n-1n

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Solution for 21=5-3n-1n equation: 



21=5-3n-1n

We move all terms to the left:

21-(5-3n-1n)=0

We add all the numbers together, and all the variables

-(-4n+5)+21=0

We get rid of parentheses

4n-5+21=0

We add all the numbers together, and all the variables

4n+16=0

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

4n=-16

n=-16/4

n=-4

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