2(x+3)4x=12

Solution for 2(x+3)4x=12 equation:

Simplifying
2(x + 3) * 4x = 12

Reorder the terms:
2(3 + x) * 4x = 12

Reorder the terms for easier multiplication:
2 * 4x(3 + x) = 12

Multiply 2 * 4
8x(3 + x) = 12
(3 * 8x + x * 8x) = 12
(24x + 8x2) = 12

Solving
24x + 8x2 = 12

Solving for variable 'x'.

Reorder the terms:
-12 + 24x + 8x2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + 24x + 8x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-3 + 6x + 2x2) = 0

Ignore the factor 4.
Subproblem 1
Set the factor '(-3 + 6x + 2x2)' equal to zero and attempt to solve:

Simplifying
-3 + 6x + 2x2 = 0

Solving
-3 + 6x + 2x2 = 0

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

Divide each side by '2'.
-1.5 + 3x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 3x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 3x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 3x + x2 = 0 + 1.5
3x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
3x + x2 = 1.5

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 1.5 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 1.5 + 2.25

Combine like terms: 1.5 + 2.25 = 3.75
2.25 + 3x + x2 = 3.75

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 3.75

Calculate the square root of the right side: 1.936491673

Break this problem into two subproblems by setting 
(x + 1.5) equal to 1.936491673 and -1.936491673.

Subproblem 1
x + 1.5 = 1.936491673

Simplifying
x + 1.5 = 1.936491673

Reorder the terms:
1.5 + x = 1.936491673

Solving
1.5 + x = 1.936491673

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1.5' to each side of the equation.
1.5 + -1.5 + x = 1.936491673 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + x = 1.936491673 + -1.5
x = 1.936491673 + -1.5

Combine like terms: 1.936491673 + -1.5 = 0.436491673
x = 0.436491673

Simplifying
x = 0.436491673

Subproblem 2
x + 1.5 = -1.936491673

Simplifying
x + 1.5 = -1.936491673

Reorder the terms:
1.5 + x = -1.936491673

Solving
1.5 + x = -1.936491673

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1.5' to each side of the equation.
1.5 + -1.5 + x = -1.936491673 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + x = -1.936491673 + -1.5
x = -1.936491673 + -1.5

Combine like terms: -1.936491673 + -1.5 = -3.436491673
x = -3.436491673

Simplifying
x = -3.436491673

Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {0.436491673, -3.436491673}
Solution
x = {0.436491673, -3.436491673}