3(2r-3)-12=

Solution for 3(2r-3)-12= equation:

Simplifying
3(2r + -3) + -12 = 0

Reorder the terms:
3(-3 + 2r) + -12 = 0
(-3 * 3 + 2r * 3) + -12 = 0
(-9 + 6r) + -12 = 0

Reorder the terms:
-9 + -12 + 6r = 0

Combine like terms: -9 + -12 = -21
-21 + 6r = 0

Solving
-21 + 6r = 0

Solving for variable 'r'.

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

Add '21' to each side of the equation.
-21 + 21 + 6r = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 6r = 0 + 21
6r = 0 + 21

Combine like terms: 0 + 21 = 21
6r = 21

Divide each side by '6'.
r = 3.5

Simplifying
r = 3.5