12=-n-2n

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Solution for 12=-n-2n equation:


Simplifying
12 = -1n + -2n

Combine like terms: -1n + -2n = -3n
12 = -3n

Solving
12 = -3n

Solving for variable 'n'.

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

Add '3n' to each side of the equation.
12 + 3n = -3n + 3n

Combine like terms: -3n + 3n = 0
12 + 3n = 0

Add '-12' to each side of the equation.
12 + -12 + 3n = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 3n = 0 + -12
3n = 0 + -12

Combine like terms: 0 + -12 = -12
3n = -12

Divide each side by '3'.
n = -4

Simplifying
n = -4

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