12=n-9

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Solution for 12=n-9 equation:


Simplifying
12 = n + -9

Reorder the terms:
12 = -9 + n

Solving
12 = -9 + n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
12 + -1n = -9 + n + -1n

Combine like terms: n + -1n = 0
12 + -1n = -9 + 0
12 + -1n = -9

Add '-12' to each side of the equation.
12 + -12 + -1n = -9 + -12

Combine like terms: 12 + -12 = 0
0 + -1n = -9 + -12
-1n = -9 + -12

Combine like terms: -9 + -12 = -21
-1n = -21

Divide each side by '-1'.
n = 21

Simplifying
n = 21

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