12r-3(9-r)=33

Solution for 12r-3(9-r)=33 equation:

Simplifying
12r + -3(9 + -1r) = 33
12r + (9 * -3 + -1r * -3) = 33
12r + (-27 + 3r) = 33

Reorder the terms:
-27 + 12r + 3r = 33

Combine like terms: 12r + 3r = 15r
-27 + 15r = 33

Solving
-27 + 15r = 33

Solving for variable 'r'.

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

Add '27' to each side of the equation.
-27 + 27 + 15r = 33 + 27

Combine like terms: -27 + 27 = 0
0 + 15r = 33 + 27
15r = 33 + 27

Combine like terms: 33 + 27 = 60
15r = 60

Divide each side by '15'.
r = 4

Simplifying
r = 4