21=n+6-4n

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Solution for 21=n+6-4n equation:


21=n+6-4n

We simplify the equation to the form, which is simple to understand 
21=n+6-4n

We move all terms containing n to the left and all other terms to the right. 
-1n+4n=+6-21

We simplify left and right side of the equation. 
+3n=-15

We divide both sides of the equation by 3 to get n. 
n=-5

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