9*9=a

Solution for 9*9=a equation:

Simplifying
9 * 9 = a

Multiply 9 * 9
81 = a

Solving
81 = a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
81 + -1a = a + -1a

Combine like terms: a + -1a = 0
81 + -1a = 0

Add '-81' to each side of the equation.
81 + -81 + -1a = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -1a = 0 + -81
-1a = 0 + -81

Combine like terms: 0 + -81 = -81
-1a = -81

Divide each side by '-1'.
a = 81

Simplifying
a = 81