4(3x+x)+7-5x=8+(5x)(5x-6x)+23

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Solution for 4(3x+x)+7-5x=8+(5x)(5x-6x)+23 equation:


Simplifying
4(3x + x) + 7 + -5x = 8 + (5x)(5x + -6x) + 23

Combine like terms: 3x + x = 4x
4(4x) + 7 + -5x = 8 + (5x)(5x + -6x) + 23

Remove parenthesis around (4x)
4 * 4x + 7 + -5x = 8 + (5x)(5x + -6x) + 23

Multiply 4 * 4
16x + 7 + -5x = 8 + (5x)(5x + -6x) + 23

Reorder the terms:
7 + 16x + -5x = 8 + (5x)(5x + -6x) + 23

Combine like terms: 16x + -5x = 11x
7 + 11x = 8 + (5x)(5x + -6x) + 23

Remove parenthesis around (5x)
7 + 11x = 8 + 5x(5x + -6x) + 23

Combine like terms: 5x + -6x = -1x
7 + 11x = 8 + 5x(-1x) + 23

Remove parenthesis around (-1x)
7 + 11x = 8 + 5x * -1x + 23

Reorder the terms for easier multiplication:
7 + 11x = 8 + 5 * -1x * x + 23

Multiply 5 * -1
7 + 11x = 8 + -5x * x + 23

Multiply x * x
7 + 11x = 8 + -5x2 + 23

Reorder the terms:
7 + 11x = 8 + 23 + -5x2

Combine like terms: 8 + 23 = 31
7 + 11x = 31 + -5x2

Solving
7 + 11x = 31 + -5x2

Solving for variable 'x'.

Reorder the terms:
7 + -31 + 11x + 5x2 = 31 + -5x2 + -31 + 5x2

Combine like terms: 7 + -31 = -24
-24 + 11x + 5x2 = 31 + -5x2 + -31 + 5x2

Reorder the terms:
-24 + 11x + 5x2 = 31 + -31 + -5x2 + 5x2

Combine like terms: 31 + -31 = 0
-24 + 11x + 5x2 = 0 + -5x2 + 5x2
-24 + 11x + 5x2 = -5x2 + 5x2

Combine like terms: -5x2 + 5x2 = 0
-24 + 11x + 5x2 = 0

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

Divide each side by '5'.
-4.8 + 2.2x + x2 = 0

Move the constant term to the right:

Add '4.8' to each side of the equation.
-4.8 + 2.2x + 4.8 + x2 = 0 + 4.8

Reorder the terms:
-4.8 + 4.8 + 2.2x + x2 = 0 + 4.8

Combine like terms: -4.8 + 4.8 = 0.0
0.0 + 2.2x + x2 = 0 + 4.8
2.2x + x2 = 0 + 4.8

Combine like terms: 0 + 4.8 = 4.8
2.2x + x2 = 4.8

The x term is 2.2x.  Take half its coefficient (1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
2.2x + 1.21 + x2 = 4.8 + 1.21

Reorder the terms:
1.21 + 2.2x + x2 = 4.8 + 1.21

Combine like terms: 4.8 + 1.21 = 6.01
1.21 + 2.2x + x2 = 6.01

Factor a perfect square on the left side:
(x + 1.1)(x + 1.1) = 6.01

Calculate the square root of the right side: 2.451530134

Break this problem into two subproblems by setting 
(x + 1.1) equal to 2.451530134 and -2.451530134.

Subproblem 1

x + 1.1 = 2.451530134 Simplifying x + 1.1 = 2.451530134 Reorder the terms: 1.1 + x = 2.451530134 Solving 1.1 + x = 2.451530134 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = 2.451530134 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = 2.451530134 + -1.1 x = 2.451530134 + -1.1 Combine like terms: 2.451530134 + -1.1 = 1.351530134 x = 1.351530134 Simplifying x = 1.351530134

Subproblem 2

x + 1.1 = -2.451530134 Simplifying x + 1.1 = -2.451530134 Reorder the terms: 1.1 + x = -2.451530134 Solving 1.1 + x = -2.451530134 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = -2.451530134 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = -2.451530134 + -1.1 x = -2.451530134 + -1.1 Combine like terms: -2.451530134 + -1.1 = -3.551530134 x = -3.551530134 Simplifying x = -3.551530134

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.351530134, -3.551530134}

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