72-9a=15a

Solution for 72-9a=15a equation:

Simplifying
72 + -9a = 15a

Solving
72 + -9a = 15a

Solving for variable 'a'.

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

Add '-15a' to each side of the equation.
72 + -9a + -15a = 15a + -15a

Combine like terms: -9a + -15a = -24a
72 + -24a = 15a + -15a

Combine like terms: 15a + -15a = 0
72 + -24a = 0

Add '-72' to each side of the equation.
72 + -72 + -24a = 0 + -72

Combine like terms: 72 + -72 = 0
0 + -24a = 0 + -72
-24a = 0 + -72

Combine like terms: 0 + -72 = -72
-24a = -72

Divide each side by '-24'.
a = 3

Simplifying
a = 3