8+x(19-2x)=6(11-x)

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Solution for 8+x(19-2x)=6(11-x) equation:


Simplifying
8 + x(19 + -2x) = 6(11 + -1x)
8 + (19 * x + -2x * x) = 6(11 + -1x)
8 + (19x + -2x2) = 6(11 + -1x)
8 + 19x + -2x2 = (11 * 6 + -1x * 6)
8 + 19x + -2x2 = (66 + -6x)

Solving
8 + 19x + -2x2 = 66 + -6x

Solving for variable 'x'.

Reorder the terms:
8 + -66 + 19x + 6x + -2x2 = 66 + -6x + -66 + 6x

Combine like terms: 8 + -66 = -58
-58 + 19x + 6x + -2x2 = 66 + -6x + -66 + 6x

Combine like terms: 19x + 6x = 25x
-58 + 25x + -2x2 = 66 + -6x + -66 + 6x

Reorder the terms:
-58 + 25x + -2x2 = 66 + -66 + -6x + 6x

Combine like terms: 66 + -66 = 0
-58 + 25x + -2x2 = 0 + -6x + 6x
-58 + 25x + -2x2 = -6x + 6x

Combine like terms: -6x + 6x = 0
-58 + 25x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
29 + -12.5x + x2 = 0

Move the constant term to the right:

Add '-29' to each side of the equation.
29 + -12.5x + -29 + x2 = 0 + -29

Reorder the terms:
29 + -29 + -12.5x + x2 = 0 + -29

Combine like terms: 29 + -29 = 0
0 + -12.5x + x2 = 0 + -29
-12.5x + x2 = 0 + -29

Combine like terms: 0 + -29 = -29
-12.5x + x2 = -29

The x term is -12.5x.  Take half its coefficient (-6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
-12.5x + 39.0625 + x2 = -29 + 39.0625

Reorder the terms:
39.0625 + -12.5x + x2 = -29 + 39.0625

Combine like terms: -29 + 39.0625 = 10.0625
39.0625 + -12.5x + x2 = 10.0625

Factor a perfect square on the left side:
(x + -6.25)(x + -6.25) = 10.0625

Calculate the square root of the right side: 3.172144385

Break this problem into two subproblems by setting 
(x + -6.25) equal to 3.172144385 and -3.172144385.

Subproblem 1

x + -6.25 = 3.172144385 Simplifying x + -6.25 = 3.172144385 Reorder the terms: -6.25 + x = 3.172144385 Solving -6.25 + x = 3.172144385 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = 3.172144385 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = 3.172144385 + 6.25 x = 3.172144385 + 6.25 Combine like terms: 3.172144385 + 6.25 = 9.422144385 x = 9.422144385 Simplifying x = 9.422144385

Subproblem 2

x + -6.25 = -3.172144385 Simplifying x + -6.25 = -3.172144385 Reorder the terms: -6.25 + x = -3.172144385 Solving -6.25 + x = -3.172144385 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = -3.172144385 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = -3.172144385 + 6.25 x = -3.172144385 + 6.25 Combine like terms: -3.172144385 + 6.25 = 3.077855615 x = 3.077855615 Simplifying x = 3.077855615

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.422144385, 3.077855615}

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