3n+12-6n=-9

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Solution for 3n+12-6n=-9 equation:


Simplifying
3n + 12 + -6n = -9

Reorder the terms:
12 + 3n + -6n = -9

Combine like terms: 3n + -6n = -3n
12 + -3n = -9

Solving
12 + -3n = -9

Solving for variable 'n'.

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

Add '-12' to each side of the equation.
12 + -12 + -3n = -9 + -12

Combine like terms: 12 + -12 = 0
0 + -3n = -9 + -12
-3n = -9 + -12

Combine like terms: -9 + -12 = -21
-3n = -21

Divide each side by '-3'.
n = 7

Simplifying
n = 7

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