15=3(r+2)

Solution for 15=3(r+2) equation:

Simplifying
15 = 3(r + 2)

Reorder the terms:
15 = 3(2 + r)
15 = (2 * 3 + r * 3)
15 = (6 + 3r)

Solving
15 = 6 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
15 + -3r = 6 + 3r + -3r

Combine like terms: 3r + -3r = 0
15 + -3r = 6 + 0
15 + -3r = 6

Add '-15' to each side of the equation.
15 + -15 + -3r = 6 + -15

Combine like terms: 15 + -15 = 0
0 + -3r = 6 + -15
-3r = 6 + -15

Combine like terms: 6 + -15 = -9
-3r = -9

Divide each side by '-3'.
r = 3

Simplifying
r = 3