9ab-9a+4ab-3a=0

Solution for 9ab-9a+4ab-3a=0 equation:

Simplifying
9ab + -9a + 4ab + -3a = 0

Reorder the terms:
-9a + -3a + 9ab + 4ab = 0

Combine like terms: -9a + -3a = -12a
-12a + 9ab + 4ab = 0

Combine like terms: 9ab + 4ab = 13ab
-12a + 13ab = 0

Solving
-12a + 13ab = 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(-12 + 13b) = 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 '(-12 + 13b)' equal to zero and attempt to solve:

Simplifying
-12 + 13b = 0

Solving
-12 + 13b = 0

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

Add '12' to each side of the equation.
-12 + 12 + 13b = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 13b = 0 + 12
13b = 0 + 12

Combine like terms: 0 + 12 = 12
13b = 12

Add '-13b' to each side of the equation.
13b + -13b = 12 + -13b

Combine like terms: 13b + -13b = 0
0 = 12 + -13b

Simplifying
0 = 12 + -13b

The solution to this equation could not be determined.

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