3n-18=12

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Solution for 3n-18=12 equation: 


Simplifying
3n + -18 = 12

Reorder the terms:
-18 + 3n = 12

Solving
-18 + 3n = 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 + 3n = 12 + 18

Combine like terms: -18 + 18 = 0
0 + 3n = 12 + 18
3n = 12 + 18

Combine like terms: 12 + 18 = 30
3n = 30

Divide each side by '3'.
n = 10

Simplifying
n = 10

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