(A+9)a=0

Solution for (A+9)a=0 equation:

Simplifying
(A + 9) * a = 0

Reorder the terms:
(9 + A) * a = 0

Reorder the terms for easier multiplication:
a(9 + A) = 0
(9 * a + A * a) = 0
(9a + aA) = 0

Solving
9a + aA = 0

Solving for variable 'a'.

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

Factor out the Greatest Common Factor (GCF), 'a'.
a(9 + A) = 0

Subproblem 1
Set the factor 'a' equal to zero and attempt to solve:

Simplifying
a = 0

Solving
a = 0

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

Simplifying
a = 0
Subproblem 2
Set the factor '(9 + A)' equal to zero and attempt to solve:

Simplifying
9 + A = 0

Solving
9 + A = 0

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

Add '-9' to each side of the equation.
9 + -9 + A = 0 + -9

Combine like terms: 9 + -9 = 0
0 + A = 0 + -9
A = 0 + -9

Combine like terms: 0 + -9 = -9
A = -9

Add '-1A' to each side of the equation.
A + -1A = -9 + -1A

Combine like terms: A + -1A = 0
0 = -9 + -1A

Simplifying
0 = -9 + -1A

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Solution
a = {0}