9n-5n=12

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Solution for 9n-5n=12 equation: 


Simplifying
9n + -5n = 12

Combine like terms: 9n + -5n = 4n
4n = 12

Solving
4n = 12

Solving for variable 'n'.

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

Divide each side by '4'.
n = 3

Simplifying
n = 3

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