2x-5(x-3)=2x(x-10)

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Solution for 2x-5(x-3)=2x(x-10) equation:


Simplifying
2x + -5(x + -3) = 2x(x + -10)

Reorder the terms:
2x + -5(-3 + x) = 2x(x + -10)
2x + (-3 * -5 + x * -5) = 2x(x + -10)
2x + (15 + -5x) = 2x(x + -10)

Reorder the terms:
15 + 2x + -5x = 2x(x + -10)

Combine like terms: 2x + -5x = -3x
15 + -3x = 2x(x + -10)

Reorder the terms:
15 + -3x = 2x(-10 + x)
15 + -3x = (-10 * 2x + x * 2x)
15 + -3x = (-20x + 2x2)

Solving
15 + -3x = -20x + 2x2

Solving for variable 'x'.

Combine like terms: -3x + 20x = 17x
15 + 17x + -2x2 = -20x + 2x2 + 20x + -2x2

Reorder the terms:
15 + 17x + -2x2 = -20x + 20x + 2x2 + -2x2

Combine like terms: -20x + 20x = 0
15 + 17x + -2x2 = 0 + 2x2 + -2x2
15 + 17x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
15 + 17x + -2x2 = 0

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

Divide each side by '-2'.
-7.5 + -8.5x + x2 = 0

Move the constant term to the right:

Add '7.5' to each side of the equation.
-7.5 + -8.5x + 7.5 + x2 = 0 + 7.5

Reorder the terms:
-7.5 + 7.5 + -8.5x + x2 = 0 + 7.5

Combine like terms: -7.5 + 7.5 = 0.0
0.0 + -8.5x + x2 = 0 + 7.5
-8.5x + x2 = 0 + 7.5

Combine like terms: 0 + 7.5 = 7.5
-8.5x + x2 = 7.5

The x term is -8.5x.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5x + 18.0625 + x2 = 7.5 + 18.0625

Reorder the terms:
18.0625 + -8.5x + x2 = 7.5 + 18.0625

Combine like terms: 7.5 + 18.0625 = 25.5625
18.0625 + -8.5x + x2 = 25.5625

Factor a perfect square on the left side:
(x + -4.25)(x + -4.25) = 25.5625

Calculate the square root of the right side: 5.055937104

Break this problem into two subproblems by setting 
(x + -4.25) equal to 5.055937104 and -5.055937104.

Subproblem 1

x + -4.25 = 5.055937104 Simplifying x + -4.25 = 5.055937104 Reorder the terms: -4.25 + x = 5.055937104 Solving -4.25 + x = 5.055937104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = 5.055937104 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = 5.055937104 + 4.25 x = 5.055937104 + 4.25 Combine like terms: 5.055937104 + 4.25 = 9.305937104 x = 9.305937104 Simplifying x = 9.305937104

Subproblem 2

x + -4.25 = -5.055937104 Simplifying x + -4.25 = -5.055937104 Reorder the terms: -4.25 + x = -5.055937104 Solving -4.25 + x = -5.055937104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = -5.055937104 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = -5.055937104 + 4.25 x = -5.055937104 + 4.25 Combine like terms: -5.055937104 + 4.25 = -0.805937104 x = -0.805937104 Simplifying x = -0.805937104

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.305937104, -0.805937104}

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