21=4n-3-1n

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Solution for 21=4n-3-1n equation:


21=4n-3-1n

We simplify the equation to the form, which is simple to understand 
21=4n-3-1n

We move all terms containing n to the left and all other terms to the right. 
-4n+1n=-3-21

We simplify left and right side of the equation. 
-3n=-24

We divide both sides of the equation by -3 to get n. 
n=8

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