21-4n=

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Solution for 21-4n= equation: 


Simplifying
21 + -4n = 0

Solving
21 + -4n = 0

Solving for variable 'n'.

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

Add '-21' to each side of the equation.
21 + -21 + -4n = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -4n = 0 + -21
-4n = 0 + -21

Combine like terms: 0 + -21 = -21
-4n = -21

Divide each side by '-4'.
n = 5.25

Simplifying
n = 5.25

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