4n=21+n

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Solution for 4n=21+n equation: 


Simplifying
4n = 21 + n

Solving
4n = 21 + n

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '-1n' to each side of the equation.
4n + -1n = 21 + n + -1n

Combine like terms: 4n + -1n = 3n
3n = 21 + n + -1n

Combine like terms: n + -1n = 0
3n = 21 + 0
3n = 21

Divide each side by '3'.
n = 7

Simplifying
n = 7

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