-72=9r

Solution for -72=9r equation:

Simplifying
-72 = 9r

Solving
-72 = 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
-72 + -9r = 9r + -9r

Combine like terms: 9r + -9r = 0
-72 + -9r = 0

Add '72' to each side of the equation.
-72 + 72 + -9r = 0 + 72

Combine like terms: -72 + 72 = 0
0 + -9r = 0 + 72
-9r = 0 + 72

Combine like terms: 0 + 72 = 72
-9r = 72

Divide each side by '-9'.
r = -8

Simplifying
r = -8