18-n=9+3

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Solution for 18-n=9+3 equation:


Simplifying
18 + -1n = 9 + 3

Combine like terms: 9 + 3 = 12
18 + -1n = 12

Solving
18 + -1n = 12

Solving for variable 'n'.

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

Add '-18' to each side of the equation.
18 + -18 + -1n = 12 + -18

Combine like terms: 18 + -18 = 0
0 + -1n = 12 + -18
-1n = 12 + -18

Combine like terms: 12 + -18 = -6
-1n = -6

Divide each side by '-1'.
n = 6

Simplifying
n = 6

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