99-(7x+11)=7(x+4)x

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Solution for 99-(7x+11)=7(x+4)x equation:


Simplifying
99 + -1(7x + 11) = 7(x + 4) * x

Reorder the terms:
99 + -1(11 + 7x) = 7(x + 4) * x
99 + (11 * -1 + 7x * -1) = 7(x + 4) * x
99 + (-11 + -7x) = 7(x + 4) * x

Combine like terms: 99 + -11 = 88
88 + -7x = 7(x + 4) * x

Reorder the terms:
88 + -7x = 7(4 + x) * x

Reorder the terms for easier multiplication:
88 + -7x = 7x(4 + x)
88 + -7x = (4 * 7x + x * 7x)
88 + -7x = (28x + 7x2)

Solving
88 + -7x = 28x + 7x2

Solving for variable 'x'.

Combine like terms: -7x + -28x = -35x
88 + -35x + -7x2 = 28x + 7x2 + -28x + -7x2

Reorder the terms:
88 + -35x + -7x2 = 28x + -28x + 7x2 + -7x2

Combine like terms: 28x + -28x = 0
88 + -35x + -7x2 = 0 + 7x2 + -7x2
88 + -35x + -7x2 = 7x2 + -7x2

Combine like terms: 7x2 + -7x2 = 0
88 + -35x + -7x2 = 0

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

Divide each side by '-7'.
-12.57142857 + 5x + x2 = 0

Move the constant term to the right:

Add '12.57142857' to each side of the equation.
-12.57142857 + 5x + 12.57142857 + x2 = 0 + 12.57142857

Reorder the terms:
-12.57142857 + 12.57142857 + 5x + x2 = 0 + 12.57142857

Combine like terms: -12.57142857 + 12.57142857 = 0.00000000
0.00000000 + 5x + x2 = 0 + 12.57142857
5x + x2 = 0 + 12.57142857

Combine like terms: 0 + 12.57142857 = 12.57142857
5x + x2 = 12.57142857

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 = 12.57142857 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 12.57142857 + 6.25

Combine like terms: 12.57142857 + 6.25 = 18.82142857
6.25 + 5x + x2 = 18.82142857

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 18.82142857

Calculate the square root of the right side: 4.33836704

Break this problem into two subproblems by setting 
(x + 2.5) equal to 4.33836704 and -4.33836704.

Subproblem 1

x + 2.5 = 4.33836704 Simplifying x + 2.5 = 4.33836704 Reorder the terms: 2.5 + x = 4.33836704 Solving 2.5 + x = 4.33836704 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 = 4.33836704 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 4.33836704 + -2.5 x = 4.33836704 + -2.5 Combine like terms: 4.33836704 + -2.5 = 1.83836704 x = 1.83836704 Simplifying x = 1.83836704

Subproblem 2

x + 2.5 = -4.33836704 Simplifying x + 2.5 = -4.33836704 Reorder the terms: 2.5 + x = -4.33836704 Solving 2.5 + x = -4.33836704 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 = -4.33836704 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -4.33836704 + -2.5 x = -4.33836704 + -2.5 Combine like terms: -4.33836704 + -2.5 = -6.83836704 x = -6.83836704 Simplifying x = -6.83836704

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.83836704, -6.83836704}

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