7x(x-5)=5(4-3)

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Solution for 7x(x-5)=5(4-3) equation:


Simplifying
7x(x + -5) = 5(4 + -3)

Reorder the terms:
7x(-5 + x) = 5(4 + -3)
(-5 * 7x + x * 7x) = 5(4 + -3)
(-35x + 7x2) = 5(4 + -3)

Combine like terms: 4 + -3 = 1
-35x + 7x2 = 5(1)

Multiply 5 * 1
-35x + 7x2 = 5

Solving
-35x + 7x2 = 5

Solving for variable 'x'.

Reorder the terms:
-5 + -35x + 7x2 = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -35x + 7x2 = 0

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

Divide each side by '7'.
-0.7142857143 + -5x + x2 = 0

Move the constant term to the right:

Add '0.7142857143' to each side of the equation.
-0.7142857143 + -5x + 0.7142857143 + x2 = 0 + 0.7142857143

Reorder the terms:
-0.7142857143 + 0.7142857143 + -5x + x2 = 0 + 0.7142857143

Combine like terms: -0.7142857143 + 0.7142857143 = 0.0000000000
0.0000000000 + -5x + x2 = 0 + 0.7142857143
-5x + x2 = 0 + 0.7142857143

Combine like terms: 0 + 0.7142857143 = 0.7142857143
-5x + x2 = 0.7142857143

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 0.7142857143 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 0.7142857143 + 6.25

Combine like terms: 0.7142857143 + 6.25 = 6.9642857143
6.25 + -5x + x2 = 6.9642857143

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 6.9642857143

Calculate the square root of the right side: 2.638993315

Break this problem into two subproblems by setting 
(x + -2.5) equal to 2.638993315 and -2.638993315.

Subproblem 1

x + -2.5 = 2.638993315 Simplifying x + -2.5 = 2.638993315 Reorder the terms: -2.5 + x = 2.638993315 Solving -2.5 + x = 2.638993315 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 2.638993315 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 2.638993315 + 2.5 x = 2.638993315 + 2.5 Combine like terms: 2.638993315 + 2.5 = 5.138993315 x = 5.138993315 Simplifying x = 5.138993315

Subproblem 2

x + -2.5 = -2.638993315 Simplifying x + -2.5 = -2.638993315 Reorder the terms: -2.5 + x = -2.638993315 Solving -2.5 + x = -2.638993315 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -2.638993315 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -2.638993315 + 2.5 x = -2.638993315 + 2.5 Combine like terms: -2.638993315 + 2.5 = -0.138993315 x = -0.138993315 Simplifying x = -0.138993315

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.138993315, -0.138993315}

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