4(6+x)=x(8x+7)

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Solution for 4(6+x)=x(8x+7) equation:


Simplifying
4(6 + x) = x(8x + 7)
(6 * 4 + x * 4) = x(8x + 7)
(24 + 4x) = x(8x + 7)

Reorder the terms:
24 + 4x = x(7 + 8x)
24 + 4x = (7 * x + 8x * x)
24 + 4x = (7x + 8x2)

Solving
24 + 4x = 7x + 8x2

Solving for variable 'x'.

Combine like terms: 4x + -7x = -3x
24 + -3x + -8x2 = 7x + 8x2 + -7x + -8x2

Reorder the terms:
24 + -3x + -8x2 = 7x + -7x + 8x2 + -8x2

Combine like terms: 7x + -7x = 0
24 + -3x + -8x2 = 0 + 8x2 + -8x2
24 + -3x + -8x2 = 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
24 + -3x + -8x2 = 0

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
-3 + 0.375x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 0.375x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + 0.375x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 0.375x + x2 = 0 + 3
0.375x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
0.375x + x2 = 3

The x term is 0.375x.  Take half its coefficient (0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
0.375x + 0.03515625 + x2 = 3 + 0.03515625

Reorder the terms:
0.03515625 + 0.375x + x2 = 3 + 0.03515625

Combine like terms: 3 + 0.03515625 = 3.03515625
0.03515625 + 0.375x + x2 = 3.03515625

Factor a perfect square on the left side:
(x + 0.1875)(x + 0.1875) = 3.03515625

Calculate the square root of the right side: 1.742169983

Break this problem into two subproblems by setting 
(x + 0.1875) equal to 1.742169983 and -1.742169983.

Subproblem 1

x + 0.1875 = 1.742169983 Simplifying x + 0.1875 = 1.742169983 Reorder the terms: 0.1875 + x = 1.742169983 Solving 0.1875 + x = 1.742169983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + x = 1.742169983 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + x = 1.742169983 + -0.1875 x = 1.742169983 + -0.1875 Combine like terms: 1.742169983 + -0.1875 = 1.554669983 x = 1.554669983 Simplifying x = 1.554669983

Subproblem 2

x + 0.1875 = -1.742169983 Simplifying x + 0.1875 = -1.742169983 Reorder the terms: 0.1875 + x = -1.742169983 Solving 0.1875 + x = -1.742169983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + x = -1.742169983 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + x = -1.742169983 + -0.1875 x = -1.742169983 + -0.1875 Combine like terms: -1.742169983 + -0.1875 = -1.929669983 x = -1.929669983 Simplifying x = -1.929669983

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.554669983, -1.929669983}

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