3r+3(r+20)=300

Solution for 3r+3(r+20)=300 equation:

Simplifying
3r + 3(r + 20) = 300

Reorder the terms:
3r + 3(20 + r) = 300
3r + (20 * 3 + r * 3) = 300
3r + (60 + 3r) = 300

Reorder the terms:
60 + 3r + 3r = 300

Combine like terms: 3r + 3r = 6r
60 + 6r = 300

Solving
60 + 6r = 300

Solving for variable 'r'.

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

Add '-60' to each side of the equation.
60 + -60 + 6r = 300 + -60

Combine like terms: 60 + -60 = 0
0 + 6r = 300 + -60
6r = 300 + -60

Combine like terms: 300 + -60 = 240
6r = 240

Divide each side by '6'.
r = 40

Simplifying
r = 40