-n-3n=-12

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Solution for -n-3n=-12 equation: 


Simplifying
-1n + -3n = -12

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