(n+2)*3=21

Solution for (n+2)*3=21 equation:

Simplifying
(n + 2) * 3 = 21

Reorder the terms:
(2 + n) * 3 = 21

Reorder the terms for easier multiplication:
3(2 + n) = 21
(2 * 3 + n * 3) = 21
(6 + 3n) = 21

Solving
6 + 3n = 21

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 + 3n = 21 + -6

Combine like terms: 6 + -6 = 0
0 + 3n = 21 + -6
3n = 21 + -6

Combine like terms: 21 + -6 = 15
3n = 15

Divide each side by '3'.
n = 5

Simplifying
n = 5