3(r+12)=300

Solution for 3(r+12)=300 equation:

Simplifying
3(r + 12) = 300

Reorder the terms:
3(12 + r) = 300
(12 * 3 + r * 3) = 300
(36 + 3r) = 300

Solving
36 + 3r = 300

Solving for variable 'r'.

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

Add '-36' to each side of the equation.
36 + -36 + 3r = 300 + -36

Combine like terms: 36 + -36 = 0
0 + 3r = 300 + -36
3r = 300 + -36

Combine like terms: 300 + -36 = 264
3r = 264

Divide each side by '3'.
r = 88

Simplifying
r = 88