(n+3)*2=12

Solution for (n+3)*2=12 equation:

Simplifying
(n + 3) * 2 = 12

Reorder the terms:
(3 + n) * 2 = 12

Reorder the terms for easier multiplication:
2(3 + n) = 12
(3 * 2 + n * 2) = 12
(6 + 2n) = 12

Solving
6 + 2n = 12

Solving for variable 'n'.

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

Add '-6' to each side of the equation.
6 + -6 + 2n = 12 + -6

Combine like terms: 6 + -6 = 0
0 + 2n = 12 + -6
2n = 12 + -6

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

Divide each side by '2'.
n = 3

Simplifying
n = 3