x(31-5-x)=10-3x

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Solution for x(31-5-x)=10-3x equation:


Simplifying
x(31 + -5 + -1x) = 10 + -3x

Combine like terms: 31 + -5 = 26
x(26 + -1x) = 10 + -3x
(26 * x + -1x * x) = 10 + -3x
(26x + -1x2) = 10 + -3x

Solving
26x + -1x2 = 10 + -3x

Solving for variable 'x'.

Reorder the terms:
-10 + 26x + 3x + -1x2 = 10 + -3x + -10 + 3x

Combine like terms: 26x + 3x = 29x
-10 + 29x + -1x2 = 10 + -3x + -10 + 3x

Reorder the terms:
-10 + 29x + -1x2 = 10 + -10 + -3x + 3x

Combine like terms: 10 + -10 = 0
-10 + 29x + -1x2 = 0 + -3x + 3x
-10 + 29x + -1x2 = -3x + 3x

Combine like terms: -3x + 3x = 0
-10 + 29x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
10 + -29x + x2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -29x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + -29x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -29x + x2 = 0 + -10
-29x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
-29x + x2 = -10

The x term is -29x.  Take half its coefficient (-14.5).
Square it (210.25) and add it to both sides.

Add '210.25' to each side of the equation.
-29x + 210.25 + x2 = -10 + 210.25

Reorder the terms:
210.25 + -29x + x2 = -10 + 210.25

Combine like terms: -10 + 210.25 = 200.25
210.25 + -29x + x2 = 200.25

Factor a perfect square on the left side:
(x + -14.5)(x + -14.5) = 200.25

Calculate the square root of the right side: 14.150971698

Break this problem into two subproblems by setting 
(x + -14.5) equal to 14.150971698 and -14.150971698.

Subproblem 1

x + -14.5 = 14.150971698 Simplifying x + -14.5 = 14.150971698 Reorder the terms: -14.5 + x = 14.150971698 Solving -14.5 + x = 14.150971698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14.5' to each side of the equation. -14.5 + 14.5 + x = 14.150971698 + 14.5 Combine like terms: -14.5 + 14.5 = 0.0 0.0 + x = 14.150971698 + 14.5 x = 14.150971698 + 14.5 Combine like terms: 14.150971698 + 14.5 = 28.650971698 x = 28.650971698 Simplifying x = 28.650971698

Subproblem 2

x + -14.5 = -14.150971698 Simplifying x + -14.5 = -14.150971698 Reorder the terms: -14.5 + x = -14.150971698 Solving -14.5 + x = -14.150971698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14.5' to each side of the equation. -14.5 + 14.5 + x = -14.150971698 + 14.5 Combine like terms: -14.5 + 14.5 = 0.0 0.0 + x = -14.150971698 + 14.5 x = -14.150971698 + 14.5 Combine like terms: -14.150971698 + 14.5 = 0.349028302 x = 0.349028302 Simplifying x = 0.349028302

Solution

The solution to the problem is based on the solutions from the subproblems. x = {28.650971698, 0.349028302}

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