un=-2*0.5n

Solution for un=-2*0.5n equation:

Simplifying
un = -2 * 0.5n

Multiply -2 * 0.5
nu = -1n

Solving
nu = -1n

Solving for variable 'n'.

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

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

Combine like terms: -1n + n = 0
n + nu = 0

Factor out the Greatest Common Factor (GCF), 'n'.
n(1 + 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 '(1 + u)' equal to zero and attempt to solve:

Simplifying
1 + u = 0

Solving
1 + u = 0

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

Add '-1' to each side of the equation.
1 + -1 + u = 0 + -1

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

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

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

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

Simplifying
0 = -1 + -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}