72.9=8.1a

Solution for 72.9=8.1a equation:

Simplifying
72.9 = 8.1a

Solving
72.9 = 8.1a

Solving for variable 'a'.

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

Add '-8.1a' to each side of the equation.
72.9 + -8.1a = 8.1a + -8.1a

Combine like terms: 8.1a + -8.1a = 0.0
72.9 + -8.1a = 0.0

Add '-72.9' to each side of the equation.
72.9 + -72.9 + -8.1a = 0.0 + -72.9

Combine like terms: 72.9 + -72.9 = 0.0
0.0 + -8.1a = 0.0 + -72.9
-8.1a = 0.0 + -72.9

Combine like terms: 0.0 + -72.9 = -72.9
-8.1a = -72.9

Divide each side by '-8.1'.
a = 9

Simplifying
a = 9