5(2x-8)=2x(7-2x)

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Solution for 5(2x-8)=2x(7-2x) equation: 


Simplifying
5(2x + -8) = 2x(7 + -2x)

Reorder the terms:
5(-8 + 2x) = 2x(7 + -2x)
(-8 * 5 + 2x * 5) = 2x(7 + -2x)
(-40 + 10x) = 2x(7 + -2x)
-40 + 10x = (7 * 2x + -2x * 2x)
-40 + 10x = (14x + -4x2)

Solving
-40 + 10x = 14x + -4x2

Solving for variable 'x'.

Combine like terms: 10x + -14x = -4x
-40 + -4x + 4x2 = 14x + -4x2 + -14x + 4x2

Reorder the terms:
-40 + -4x + 4x2 = 14x + -14x + -4x2 + 4x2

Combine like terms: 14x + -14x = 0
-40 + -4x + 4x2 = 0 + -4x2 + 4x2
-40 + -4x + 4x2 = -4x2 + 4x2

Combine like terms: -4x2 + 4x2 = 0
-40 + -4x + 4x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-10 + -1x + x2) = 0

Ignore the factor 4.

Subproblem 1
Set the factor '(-10 + -1x + x2)' equal to zero and attempt to solve:

Simplifying
-10 + -1x + x2 = 0

Solving
-10 + -1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -1x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + -1x + x2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -1x + x2 = 0 + 10
-1x + x2 = 0 + 10

Combine like terms: 0 + 10 = 10
-1x + x2 = 10

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 10 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 10 + 0.25

Combine like terms: 10 + 0.25 = 10.25
0.25 + -1x + x2 = 10.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 10.25

Calculate the square root of the right side: 3.201562119

Break this problem into two subproblems by setting 
(x + -0.5) equal to 3.201562119 and -3.201562119.


Subproblem 1
x + -0.5 = 3.201562119

Simplifying
x + -0.5 = 3.201562119

Reorder the terms:
-0.5 + x = 3.201562119

Solving
-0.5 + x = 3.201562119

Solving for variable 'x'.

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

Add '0.5' to each side of the equation.
-0.5 + 0.5 + x = 3.201562119 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + x = 3.201562119 + 0.5
x = 3.201562119 + 0.5

Combine like terms: 3.201562119 + 0.5 = 3.701562119
x = 3.701562119

Simplifying
x = 3.701562119


Subproblem 2
x + -0.5 = -3.201562119

Simplifying
x + -0.5 = -3.201562119

Reorder the terms:
-0.5 + x = -3.201562119

Solving
-0.5 + x = -3.201562119

Solving for variable 'x'.

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

Add '0.5' to each side of the equation.
-0.5 + 0.5 + x = -3.201562119 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + x = -3.201562119 + 0.5
x = -3.201562119 + 0.5

Combine like terms: -3.201562119 + 0.5 = -2.701562119
x = -2.701562119

Simplifying
x = -2.701562119


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {3.701562119, -2.701562119}
Solution
x = {3.701562119, -2.701562119}

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