n+18+2n+90=180

Solution for n+18+2n+90=180 equation:

Simplifying
n + 18 + 2n + 90 = 180

Reorder the terms:
18 + 90 + n + 2n = 180

Combine like terms: 18 + 90 = 108
108 + n + 2n = 180

Combine like terms: n + 2n = 3n
108 + 3n = 180

Solving
108 + 3n = 180

Solving for variable 'n'.

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

Add '-108' to each side of the equation.
108 + -108 + 3n = 180 + -108

Combine like terms: 108 + -108 = 0
0 + 3n = 180 + -108
3n = 180 + -108

Combine like terms: 180 + -108 = 72
3n = 72

Divide each side by '3'.
n = 24

Simplifying
n = 24