(3a-9ab+b)-(8b-ab+7a)=

Solution for (3a-9ab+b)-(8b-ab+7a)= equation:

Simplifying
(3a + -9ab + b) + -1(8b + -1ab + 7a) = 0

Remove parenthesis around (3a + -9ab + b)
3a + -9ab + b + -1(8b + -1ab + 7a) = 0

Reorder the terms:
3a + -9ab + b + -1(7a + -1ab + 8b) = 0
3a + -9ab + b + (7a * -1 + -1ab * -1 + 8b * -1) = 0
3a + -9ab + b + (-7a + 1ab + -8b) = 0

Reorder the terms:
3a + -7a + -9ab + 1ab + b + -8b = 0

Combine like terms: 3a + -7a = -4a
-4a + -9ab + 1ab + b + -8b = 0

Combine like terms: -9ab + 1ab = -8ab
-4a + -8ab + b + -8b = 0

Combine like terms: b + -8b = -7b
-4a + -8ab + -7b = 0

Solving
-4a + -8ab + -7b = 0

Solving for variable 'a'.

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

Add '7b' to each side of the equation.
-4a + -8ab + -7b + 7b = 0 + 7b

Combine like terms: -7b + 7b = 0
-4a + -8ab + 0 = 0 + 7b
-4a + -8ab = 0 + 7b
Remove the zero:
-4a + -8ab = 7b

Combine like terms: 7b + -7b = 0
-4a + -8ab + -7b = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(4a + 8ab + 7b) = 0

Ignore the factor -1.
Subproblem 1
Set the factor '(4a + 8ab + 7b)' equal to zero and attempt to solve:

Simplifying
4a + 8ab + 7b = 0

Solving
4a + 8ab + 7b = 0

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

Add '-7b' to each side of the equation.
4a + 8ab + 7b + -7b = 0 + -7b

Combine like terms: 7b + -7b = 0
4a + 8ab + 0 = 0 + -7b
4a + 8ab = 0 + -7b
Remove the zero:
4a + 8ab = -7b

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.

The solution to this equation could not be determined.