n+2n=81

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Solution for n+2n=81 equation: 


Simplifying
n + 2n = 81

Combine like terms: n + 2n = 3n
3n = 81

Solving
3n = 81

Solving for variable 'n'.

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

Divide each side by '3'.
n = 27

Simplifying
n = 27

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