72=18w-9w

Solution for 72=18w-9w equation:

Simplifying
72 = 18w + -9w

Combine like terms: 18w + -9w = 9w
72 = 9w

Solving
72 = 9w

Solving for variable 'w'.

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

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

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

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

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

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

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

Simplifying
w = 8