(7x-7)(9x+8)=0

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Solution for (7x-7)(9x+8)=0 equation: 


Simplifying
(7x + -7)(9x + 8) = 0

Reorder the terms:
(-7 + 7x)(9x + 8) = 0

Reorder the terms:
(-7 + 7x)(8 + 9x) = 0

Multiply (-7 + 7x) * (8 + 9x)
(-7(8 + 9x) + 7x * (8 + 9x)) = 0
((8 * -7 + 9x * -7) + 7x * (8 + 9x)) = 0
((-56 + -63x) + 7x * (8 + 9x)) = 0
(-56 + -63x + (8 * 7x + 9x * 7x)) = 0
(-56 + -63x + (56x + 63x2)) = 0

Combine like terms: -63x + 56x = -7x
(-56 + -7x + 63x2) = 0

Solving
-56 + -7x + 63x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '7'.
7(-8 + -1x + 9x2) = 0

Factor a trinomial.
7((-8 + -9x)(1 + -1x)) = 0

Ignore the factor 7.

Subproblem 1
Set the factor '(-8 + -9x)' equal to zero and attempt to solve:

Simplifying
-8 + -9x = 0

Solving
-8 + -9x = 0

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

Add '8' to each side of the equation.
-8 + 8 + -9x = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -9x = 0 + 8
-9x = 0 + 8

Combine like terms: 0 + 8 = 8
-9x = 8

Divide each side by '-9'.
x = -0.8888888889

Simplifying
x = -0.8888888889

Subproblem 2
Set the factor '(1 + -1x)' equal to zero and attempt to solve:

Simplifying
1 + -1x = 0

Solving
1 + -1x = 0

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

Add '-1' to each side of the equation.
1 + -1 + -1x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -1x = 0 + -1
-1x = 0 + -1

Combine like terms: 0 + -1 = -1
-1x = -1

Divide each side by '-1'.
x = 1

Simplifying
x = 1
Solution
x = {-0.8888888889, 1}

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