=3a-7ab

Solution for =3a-7ab equation:

Simplifying
0 = 3a + -7ab

Solving
0 = 3a + -7ab

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
0 + -3a = 3a + -3a + -7ab
Remove the zero:
-3a = 3a + -3a + -7ab

Combine like terms: 3a + -3a = 0
-3a = 0 + -7ab
-3a = -7ab

Add '7ab' to each side of the equation.
-3a + 7ab = -7ab + 7ab

Combine like terms: -7ab + 7ab = 0
-3a + 7ab = 0

Factor out the Greatest Common Factor (GCF), 'a'.
a(-3 + 7b) = 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 '(-3 + 7b)' equal to zero and attempt to solve:

Simplifying
-3 + 7b = 0

Solving
-3 + 7b = 0

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

Add '3' to each side of the equation.
-3 + 3 + 7b = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 7b = 0 + 3
7b = 0 + 3

Combine like terms: 0 + 3 = 3
7b = 3

Add '-7b' to each side of the equation.
7b + -7b = 3 + -7b

Combine like terms: 7b + -7b = 0
0 = 3 + -7b

Simplifying
0 = 3 + -7b

The solution to this equation could not be determined.

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