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 = -6a
72 + -6a = 15a + -15a

Combine like terms: 15a + -15a = 0
72 + -6a = 0

Add '-72' to each side of the equation.
72 + -72 + -6a = 0 + -72

Combine like terms: 72 + -72 = 0
0 + -6a = 0 + -72
-6a = 0 + -72

Combine like terms: 0 + -72 = -72
-6a = -72

Divide each side by '-6'.
a = 12

Simplifying
a = 12