21=7xn

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Solution for 21=7xn equation:


Simplifying
21 = 7xn

Solving
21 = 7nx

Solving for variable 'n'.

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

Add '-7nx' to each side of the equation.
21 + -7nx = 7nx + -7nx

Combine like terms: 7nx + -7nx = 0
21 + -7nx = 0

Add '-21' to each side of the equation.
21 + -21 + -7nx = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -7nx = 0 + -21
-7nx = 0 + -21

Combine like terms: 0 + -21 = -21
-7nx = -21

Divide each side by '-7x'.
n = 3x-1

Simplifying
n = 3x-1

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