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

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


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

Reorder the terms:
3(4 + x) + -6x = 8 + -3(x + -5) * x
(4 * 3 + x * 3) + -6x = 8 + -3(x + -5) * x
(12 + 3x) + -6x = 8 + -3(x + -5) * x

Combine like terms: 3x + -6x = -3x
12 + -3x = 8 + -3(x + -5) * x

Reorder the terms:
12 + -3x = 8 + -3(-5 + x) * x

Reorder the terms for easier multiplication:
12 + -3x = 8 + -3x(-5 + x)
12 + -3x = 8 + (-5 * -3x + x * -3x)
12 + -3x = 8 + (15x + -3x2)

Solving
12 + -3x = 8 + 15x + -3x2

Solving for variable 'x'.

Reorder the terms:
12 + -8 + -3x + -15x + 3x2 = 8 + 15x + -3x2 + -8 + -15x + 3x2

Combine like terms: 12 + -8 = 4
4 + -3x + -15x + 3x2 = 8 + 15x + -3x2 + -8 + -15x + 3x2

Combine like terms: -3x + -15x = -18x
4 + -18x + 3x2 = 8 + 15x + -3x2 + -8 + -15x + 3x2

Reorder the terms:
4 + -18x + 3x2 = 8 + -8 + 15x + -15x + -3x2 + 3x2

Combine like terms: 8 + -8 = 0
4 + -18x + 3x2 = 0 + 15x + -15x + -3x2 + 3x2
4 + -18x + 3x2 = 15x + -15x + -3x2 + 3x2

Combine like terms: 15x + -15x = 0
4 + -18x + 3x2 = 0 + -3x2 + 3x2
4 + -18x + 3x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
4 + -18x + 3x2 = 0

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

Divide each side by '3'.
1.333333333 + -6x + x2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + -6x + -1.333333333 + x2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + -6x + x2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + -6x + x2 = 0 + -1.333333333
-6x + x2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
-6x + x2 = -1.333333333

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = -1.333333333 + 9

Reorder the terms:
9 + -6x + x2 = -1.333333333 + 9

Combine like terms: -1.333333333 + 9 = 7.666666667
9 + -6x + x2 = 7.666666667

Factor a perfect square on the left side:
(x + -3)(x + -3) = 7.666666667

Calculate the square root of the right side: 2.768874621

Break this problem into two subproblems by setting 
(x + -3) equal to 2.768874621 and -2.768874621.

Subproblem 1

x + -3 = 2.768874621 Simplifying x + -3 = 2.768874621 Reorder the terms: -3 + x = 2.768874621 Solving -3 + x = 2.768874621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 2.768874621 + 3 Combine like terms: -3 + 3 = 0 0 + x = 2.768874621 + 3 x = 2.768874621 + 3 Combine like terms: 2.768874621 + 3 = 5.768874621 x = 5.768874621 Simplifying x = 5.768874621

Subproblem 2

x + -3 = -2.768874621 Simplifying x + -3 = -2.768874621 Reorder the terms: -3 + x = -2.768874621 Solving -3 + x = -2.768874621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -2.768874621 + 3 Combine like terms: -3 + 3 = 0 0 + x = -2.768874621 + 3 x = -2.768874621 + 3 Combine like terms: -2.768874621 + 3 = 0.231125379 x = 0.231125379 Simplifying x = 0.231125379

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.768874621, 0.231125379}

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