un=3n

Solution for un=3n equation:

Simplifying
un = 3n

Solving
nu = 3n

Solving for variable 'n'.

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

Add '-3n' to each side of the equation.
-3n + nu = 3n + -3n

Combine like terms: 3n + -3n = 0
-3n + nu = 0

Factor out the Greatest Common Factor (GCF), 'n'.
n(-3 + u) = 0

Subproblem 1
Set the factor 'n' equal to zero and attempt to solve:

Simplifying
n = 0

Solving
n = 0

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

Simplifying
n = 0
Subproblem 2
Set the factor '(-3 + u)' equal to zero and attempt to solve:

Simplifying
-3 + u = 0

Solving
-3 + u = 0

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

Add '3' to each side of the equation.
-3 + 3 + u = 0 + 3

Combine like terms: -3 + 3 = 0
0 + u = 0 + 3
u = 0 + 3

Combine like terms: 0 + 3 = 3
u = 3

Add '-1u' to each side of the equation.
u + -1u = 3 + -1u

Combine like terms: u + -1u = 0
0 = 3 + -1u

Simplifying
0 = 3 + -1u

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Solution
n = {0}