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

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


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

Reorder the terms:
4x(-7 + x) = 7(x + -5)
(-7 * 4x + x * 4x) = 7(x + -5)
(-28x + 4x2) = 7(x + -5)

Reorder the terms:
-28x + 4x2 = 7(-5 + x)
-28x + 4x2 = (-5 * 7 + x * 7)
-28x + 4x2 = (-35 + 7x)

Solving
-28x + 4x2 = -35 + 7x

Solving for variable 'x'.

Reorder the terms:
35 + -28x + -7x + 4x2 = -35 + 7x + 35 + -7x

Combine like terms: -28x + -7x = -35x
35 + -35x + 4x2 = -35 + 7x + 35 + -7x

Reorder the terms:
35 + -35x + 4x2 = -35 + 35 + 7x + -7x

Combine like terms: -35 + 35 = 0
35 + -35x + 4x2 = 0 + 7x + -7x
35 + -35x + 4x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
35 + -35x + 4x2 = 0

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

Divide each side by '4'.
8.75 + -8.75x + x2 = 0

Move the constant term to the right:

Add '-8.75' to each side of the equation.
8.75 + -8.75x + -8.75 + x2 = 0 + -8.75

Reorder the terms:
8.75 + -8.75 + -8.75x + x2 = 0 + -8.75

Combine like terms: 8.75 + -8.75 = 0.00
0.00 + -8.75x + x2 = 0 + -8.75
-8.75x + x2 = 0 + -8.75

Combine like terms: 0 + -8.75 = -8.75
-8.75x + x2 = -8.75

The x term is -8.75x.  Take half its coefficient (-4.375).
Square it (19.140625) and add it to both sides.

Add '19.140625' to each side of the equation.
-8.75x + 19.140625 + x2 = -8.75 + 19.140625

Reorder the terms:
19.140625 + -8.75x + x2 = -8.75 + 19.140625

Combine like terms: -8.75 + 19.140625 = 10.390625
19.140625 + -8.75x + x2 = 10.390625

Factor a perfect square on the left side:
(x + -4.375)(x + -4.375) = 10.390625

Calculate the square root of the right side: 3.22344924

Break this problem into two subproblems by setting 
(x + -4.375) equal to 3.22344924 and -3.22344924.

Subproblem 1

x + -4.375 = 3.22344924 Simplifying x + -4.375 = 3.22344924 Reorder the terms: -4.375 + x = 3.22344924 Solving -4.375 + x = 3.22344924 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.375' to each side of the equation. -4.375 + 4.375 + x = 3.22344924 + 4.375 Combine like terms: -4.375 + 4.375 = 0.000 0.000 + x = 3.22344924 + 4.375 x = 3.22344924 + 4.375 Combine like terms: 3.22344924 + 4.375 = 7.59844924 x = 7.59844924 Simplifying x = 7.59844924

Subproblem 2

x + -4.375 = -3.22344924 Simplifying x + -4.375 = -3.22344924 Reorder the terms: -4.375 + x = -3.22344924 Solving -4.375 + x = -3.22344924 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.375' to each side of the equation. -4.375 + 4.375 + x = -3.22344924 + 4.375 Combine like terms: -4.375 + 4.375 = 0.000 0.000 + x = -3.22344924 + 4.375 x = -3.22344924 + 4.375 Combine like terms: -3.22344924 + 4.375 = 1.15155076 x = 1.15155076 Simplifying x = 1.15155076

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.59844924, 1.15155076}

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