0.30(480)+0.55x=(0.40x)(x+480)

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Solution for 0.30(480)+0.55x=(0.40x)(x+480) equation:


Simplifying
0.30(480) + 0.55x = (0.40x)(x + 480)

Multiply 0.30 * 480
144 + 0.55x = (0.40x)(x + 480)

Remove parenthesis around (0.40x)
144 + 0.55x = 0.40x(x + 480)

Reorder the terms:
144 + 0.55x = 0.40x(480 + x)
144 + 0.55x = (480 * 0.40x + x * 0.40x)
144 + 0.55x = (192x + 0.40x2)

Solving
144 + 0.55x = 192x + 0.40x2

Solving for variable 'x'.

Combine like terms: 0.55x + -192x = -191.45x
144 + -191.45x + -0.40x2 = 192x + 0.40x2 + -192x + -0.40x2

Reorder the terms:
144 + -191.45x + -0.40x2 = 192x + -192x + 0.40x2 + -0.40x2

Combine like terms: 192x + -192x = 0
144 + -191.45x + -0.40x2 = 0 + 0.40x2 + -0.40x2
144 + -191.45x + -0.40x2 = 0.40x2 + -0.40x2

Combine like terms: 0.40x2 + -0.40x2 = 0.00
144 + -191.45x + -0.40x2 = 0.00

Begin completing the square.  Divide all terms by
-0.40 the coefficient of the squared term: 

Divide each side by '-0.40'.
-360 + 478.625x + x2 = 0

Move the constant term to the right:

Add '360' to each side of the equation.
-360 + 478.625x + 360 + x2 = 0 + 360

Reorder the terms:
-360 + 360 + 478.625x + x2 = 0 + 360

Combine like terms: -360 + 360 = 0
0 + 478.625x + x2 = 0 + 360
478.625x + x2 = 0 + 360

Combine like terms: 0 + 360 = 360
478.625x + x2 = 360

The x term is 478.625x.  Take half its coefficient (239.3125).
Square it (57270.47266) and add it to both sides.

Add '57270.47266' to each side of the equation.
478.625x + 57270.47266 + x2 = 360 + 57270.47266

Reorder the terms:
57270.47266 + 478.625x + x2 = 360 + 57270.47266

Combine like terms: 360 + 57270.47266 = 57630.47266
57270.47266 + 478.625x + x2 = 57630.47266

Factor a perfect square on the left side:
(x + 239.3125)(x + 239.3125) = 57630.47266

Calculate the square root of the right side: 240.063476314

Break this problem into two subproblems by setting 
(x + 239.3125) equal to 240.063476314 and -240.063476314.

Subproblem 1

x + 239.3125 = 240.063476314 Simplifying x + 239.3125 = 240.063476314 Reorder the terms: 239.3125 + x = 240.063476314 Solving 239.3125 + x = 240.063476314 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-239.3125' to each side of the equation. 239.3125 + -239.3125 + x = 240.063476314 + -239.3125 Combine like terms: 239.3125 + -239.3125 = 0.0000 0.0000 + x = 240.063476314 + -239.3125 x = 240.063476314 + -239.3125 Combine like terms: 240.063476314 + -239.3125 = 0.750976314 x = 0.750976314 Simplifying x = 0.750976314

Subproblem 2

x + 239.3125 = -240.063476314 Simplifying x + 239.3125 = -240.063476314 Reorder the terms: 239.3125 + x = -240.063476314 Solving 239.3125 + x = -240.063476314 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-239.3125' to each side of the equation. 239.3125 + -239.3125 + x = -240.063476314 + -239.3125 Combine like terms: 239.3125 + -239.3125 = 0.0000 0.0000 + x = -240.063476314 + -239.3125 x = -240.063476314 + -239.3125 Combine like terms: -240.063476314 + -239.3125 = -479.375976314 x = -479.375976314 Simplifying x = -479.375976314

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.750976314, -479.375976314}

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