72=18u

Solution for 72=18u equation:

Simplifying
72 = 18u

Solving
72 = 18u

Solving for variable 'u'.

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

Add '-18u' to each side of the equation.
72 + -18u = 18u + -18u

Combine like terms: 18u + -18u = 0
72 + -18u = 0

Add '-72' to each side of the equation.
72 + -72 + -18u = 0 + -72

Combine like terms: 72 + -72 = 0
0 + -18u = 0 + -72
-18u = 0 + -72

Combine like terms: 0 + -72 = -72
-18u = -72

Divide each side by '-18'.
u = 4

Simplifying
u = 4