n+8n=72

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Solution for n+8n=72 equation: 


Simplifying
n + 8n = 72

Combine like terms: n + 8n = 9n
9n = 72

Solving
9n = 72

Solving for variable 'n'.

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

Divide each side by '9'.
n = 8

Simplifying
n = 8

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