3n+6=n+18

Solution for 3n+6=n+18 equation:

Simplifying
3n + 6 = n + 18

Reorder the terms:
6 + 3n = n + 18

Reorder the terms:
6 + 3n = 18 + n

Solving
6 + 3n = 18 + 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.
6 + 3n + -1n = 18 + n + -1n

Combine like terms: 3n + -1n = 2n
6 + 2n = 18 + n + -1n

Combine like terms: n + -1n = 0
6 + 2n = 18 + 0
6 + 2n = 18

Add '-6' to each side of the equation.
6 + -6 + 2n = 18 + -6

Combine like terms: 6 + -6 = 0
0 + 2n = 18 + -6
2n = 18 + -6

Combine like terms: 18 + -6 = 12
2n = 12

Divide each side by '2'.
n = 6

Simplifying
n = 6