n+138=180

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Solution for n+138=180 equation: 


Simplifying
n + 138 = 180

Reorder the terms:
138 + n = 180

Solving
138 + n = 180

Solving for variable 'n'.

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

Add '-138' to each side of the equation.
138 + -138 + n = 180 + -138

Combine like terms: 138 + -138 = 0
0 + n = 180 + -138
n = 180 + -138

Combine like terms: 180 + -138 = 42
n = 42

Simplifying
n = 42

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