90+(n+40)+n=180

Solution for 90+(n+40)+n=180 equation:

Simplifying
90 + (n + 40) + n = 180

Reorder the terms:
90 + (40 + n) + n = 180

Remove parenthesis around (40 + n)
90 + 40 + n + n = 180

Combine like terms: 90 + 40 = 130
130 + n + n = 180

Combine like terms: n + n = 2n
130 + 2n = 180

Solving
130 + 2n = 180

Solving for variable 'n'.

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

Add '-130' to each side of the equation.
130 + -130 + 2n = 180 + -130

Combine like terms: 130 + -130 = 0
0 + 2n = 180 + -130
2n = 180 + -130

Combine like terms: 180 + -130 = 50
2n = 50

Divide each side by '2'.
n = 25

Simplifying
n = 25