0.60x+0.40x(100-x)=50

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Solution for 0.60x+0.40x(100-x)=50 equation:


Simplifying
0.60x + 0.40x(100 + -1x) = 50
0.60x + (100 * 0.40x + -1x * 0.40x) = 50
0.60x + (40x + -0.4x2) = 50

Combine like terms: 0.60x + 40x = 40.6x
40.6x + -0.4x2 = 50

Solving
40.6x + -0.4x2 = 50

Solving for variable 'x'.

Reorder the terms:
-50 + 40.6x + -0.4x2 = 50 + -50

Combine like terms: 50 + -50 = 0
-50 + 40.6x + -0.4x2 = 0

Begin completing the square.  Divide all terms by
-0.4 the coefficient of the squared term: 

Divide each side by '-0.4'.
125 + -101.5x + x2 = 0

Move the constant term to the right:

Add '-125' to each side of the equation.
125 + -101.5x + -125 + x2 = 0 + -125

Reorder the terms:
125 + -125 + -101.5x + x2 = 0 + -125

Combine like terms: 125 + -125 = 0
0 + -101.5x + x2 = 0 + -125
-101.5x + x2 = 0 + -125

Combine like terms: 0 + -125 = -125
-101.5x + x2 = -125

The x term is -101.5x.  Take half its coefficient (-50.75).
Square it (2575.5625) and add it to both sides.

Add '2575.5625' to each side of the equation.
-101.5x + 2575.5625 + x2 = -125 + 2575.5625

Reorder the terms:
2575.5625 + -101.5x + x2 = -125 + 2575.5625

Combine like terms: -125 + 2575.5625 = 2450.5625
2575.5625 + -101.5x + x2 = 2450.5625

Factor a perfect square on the left side:
(x + -50.75)(x + -50.75) = 2450.5625

Calculate the square root of the right side: 49.503156465

Break this problem into two subproblems by setting 
(x + -50.75) equal to 49.503156465 and -49.503156465.

Subproblem 1

x + -50.75 = 49.503156465 Simplifying x + -50.75 = 49.503156465 Reorder the terms: -50.75 + x = 49.503156465 Solving -50.75 + x = 49.503156465 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '50.75' to each side of the equation. -50.75 + 50.75 + x = 49.503156465 + 50.75 Combine like terms: -50.75 + 50.75 = 0.00 0.00 + x = 49.503156465 + 50.75 x = 49.503156465 + 50.75 Combine like terms: 49.503156465 + 50.75 = 100.253156465 x = 100.253156465 Simplifying x = 100.253156465

Subproblem 2

x + -50.75 = -49.503156465 Simplifying x + -50.75 = -49.503156465 Reorder the terms: -50.75 + x = -49.503156465 Solving -50.75 + x = -49.503156465 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '50.75' to each side of the equation. -50.75 + 50.75 + x = -49.503156465 + 50.75 Combine like terms: -50.75 + 50.75 = 0.00 0.00 + x = -49.503156465 + 50.75 x = -49.503156465 + 50.75 Combine like terms: -49.503156465 + 50.75 = 1.246843535 x = 1.246843535 Simplifying x = 1.246843535

Solution

The solution to the problem is based on the solutions from the subproblems. x = {100.253156465, 1.246843535}

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