-n+-2n=9

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Solution for -n+-2n=9 equation: 


Simplifying
-1n + -2n = 9

Combine like terms: -1n + -2n = -3n
-3n = 9

Solving
-3n = 9

Solving for variable 'n'.

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

Divide each side by '-3'.
n = -3

Simplifying
n = -3

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