3+8x=3(2x-1)x

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Solution for 3+8x=3(2x-1)x equation:


Simplifying
3 + 8x = 3(2x + -1) * x

Reorder the terms:
3 + 8x = 3(-1 + 2x) * x

Reorder the terms for easier multiplication:
3 + 8x = 3x(-1 + 2x)
3 + 8x = (-1 * 3x + 2x * 3x)
3 + 8x = (-3x + 6x2)

Solving
3 + 8x = -3x + 6x2

Solving for variable 'x'.

Combine like terms: 8x + 3x = 11x
3 + 11x + -6x2 = -3x + 6x2 + 3x + -6x2

Reorder the terms:
3 + 11x + -6x2 = -3x + 3x + 6x2 + -6x2

Combine like terms: -3x + 3x = 0
3 + 11x + -6x2 = 0 + 6x2 + -6x2
3 + 11x + -6x2 = 6x2 + -6x2

Combine like terms: 6x2 + -6x2 = 0
3 + 11x + -6x2 = 0

Begin completing the square.  Divide all terms by
-6 the coefficient of the squared term: 

Divide each side by '-6'.
-0.5 + -1.833333333x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -1.833333333x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -1.833333333x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -1.833333333x + x2 = 0 + 0.5
-1.833333333x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-1.833333333x + x2 = 0.5

The x term is -1.833333333x.  Take half its coefficient (-0.9166666665).
Square it (0.8402777775) and add it to both sides.

Add '0.8402777775' to each side of the equation.
-1.833333333x + 0.8402777775 + x2 = 0.5 + 0.8402777775

Reorder the terms:
0.8402777775 + -1.833333333x + x2 = 0.5 + 0.8402777775

Combine like terms: 0.5 + 0.8402777775 = 1.3402777775
0.8402777775 + -1.833333333x + x2 = 1.3402777775

Factor a perfect square on the left side:
(x + -0.9166666665)(x + -0.9166666665) = 1.3402777775

Calculate the square root of the right side: 1.157703666

Break this problem into two subproblems by setting 
(x + -0.9166666665) equal to 1.157703666 and -1.157703666.

Subproblem 1

x + -0.9166666665 = 1.157703666 Simplifying x + -0.9166666665 = 1.157703666 Reorder the terms: -0.9166666665 + x = 1.157703666 Solving -0.9166666665 + x = 1.157703666 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + x = 1.157703666 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + x = 1.157703666 + 0.9166666665 x = 1.157703666 + 0.9166666665 Combine like terms: 1.157703666 + 0.9166666665 = 2.0743703325 x = 2.0743703325 Simplifying x = 2.0743703325

Subproblem 2

x + -0.9166666665 = -1.157703666 Simplifying x + -0.9166666665 = -1.157703666 Reorder the terms: -0.9166666665 + x = -1.157703666 Solving -0.9166666665 + x = -1.157703666 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + x = -1.157703666 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + x = -1.157703666 + 0.9166666665 x = -1.157703666 + 0.9166666665 Combine like terms: -1.157703666 + 0.9166666665 = -0.2410369995 x = -0.2410369995 Simplifying x = -0.2410369995

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.0743703325, -0.2410369995}

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