ab+3ab*9ab-21ba=

Solution for ab+3ab*9ab-21ba= equation:

Simplifying
ab + 3ab * 9ab + -21ba = 0

Reorder the terms for easier multiplication:
ab + 3 * 9ab * ab + -21ba = 0

Multiply 3 * 9
ab + 27ab * ab + -21ba = 0

Multiply ab * ab
ab + 27a2b2 + -21ba = 0

Reorder the terms:
ab + -21ab + 27a2b2 = 0

Combine like terms: ab + -21ab = -20ab
-20ab + 27a2b2 = 0

Solving
-20ab + 27a2b2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), 'ab'.
ab(-20 + 27ab) = 0

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

Simplifying
ab = 0

Solving
ab = 0

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

Simplifying
ab = 0

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Subproblem 2
Set the factor '(-20 + 27ab)' equal to zero and attempt to solve:

Simplifying
-20 + 27ab = 0

Solving
-20 + 27ab = 0

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

Add '20' to each side of the equation.
-20 + 20 + 27ab = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 27ab = 0 + 20
27ab = 0 + 20

Combine like terms: 0 + 20 = 20
27ab = 20

Divide each side by '27b'.
a = 0.7407407407b-1

Simplifying
a = 0.7407407407b-1
Solution
a = {0.7407407407b-1}