120+n+n=180

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Solution for 120+n+n=180 equation: 


Simplifying
120 + n + n = 180

Combine like terms: n + n = 2n
120 + 2n = 180

Solving
120 + 2n = 180

Solving for variable 'n'.

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

Add '-120' to each side of the equation.
120 + -120 + 2n = 180 + -120

Combine like terms: 120 + -120 = 0
0 + 2n = 180 + -120
2n = 180 + -120

Combine like terms: 180 + -120 = 60
2n = 60

Divide each side by '2'.
n = 30

Simplifying
n = 30

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