72=r*36

Solution for 72=r*36 equation:

Simplifying
72 = r * 36

Reorder the terms for easier multiplication:
72 = 36r

Solving
72 = 36r

Solving for variable 'r'.

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

Add '-36r' to each side of the equation.
72 + -36r = 36r + -36r

Combine like terms: 36r + -36r = 0
72 + -36r = 0

Add '-72' to each side of the equation.
72 + -72 + -36r = 0 + -72

Combine like terms: 72 + -72 = 0
0 + -36r = 0 + -72
-36r = 0 + -72

Combine like terms: 0 + -72 = -72
-36r = -72

Divide each side by '-36'.
r = 2

Simplifying
r = 2