(x-8)(5x-4)=0

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Solution for (x-8)(5x-4)=0 equation: 


Simplifying
(x + -8)(5x + -4) = 0

Reorder the terms:
(-8 + x)(5x + -4) = 0

Reorder the terms:
(-8 + x)(-4 + 5x) = 0

Multiply (-8 + x) * (-4 + 5x)
(-8(-4 + 5x) + x(-4 + 5x)) = 0
((-4 * -8 + 5x * -8) + x(-4 + 5x)) = 0
((32 + -40x) + x(-4 + 5x)) = 0
(32 + -40x + (-4 * x + 5x * x)) = 0
(32 + -40x + (-4x + 5x2)) = 0

Combine like terms: -40x + -4x = -44x
(32 + -44x + 5x2) = 0

Solving
32 + -44x + 5x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(4 + -5x)(8 + -1x) = 0


Subproblem 1
Set the factor '(4 + -5x)' equal to zero and attempt to solve:

Simplifying
4 + -5x = 0

Solving
4 + -5x = 0

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

Add '-4' to each side of the equation.
4 + -4 + -5x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -5x = 0 + -4
-5x = 0 + -4

Combine like terms: 0 + -4 = -4
-5x = -4

Divide each side by '-5'.
x = 0.8

Simplifying
x = 0.8

Subproblem 2
Set the factor '(8 + -1x)' equal to zero and attempt to solve:

Simplifying
8 + -1x = 0

Solving
8 + -1x = 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 + -1x = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -1x = 0 + -8
-1x = 0 + -8

Combine like terms: 0 + -8 = -8
-1x = -8

Divide each side by '-1'.
x = 8

Simplifying
x = 8
Solution
x = {0.8, 8}

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