10x+3=3x(2x+2)

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Solution for 10x+3=3x(2x+2) equation:


Simplifying
10x + 3 = 3x(2x + 2)

Reorder the terms:
3 + 10x = 3x(2x + 2)

Reorder the terms:
3 + 10x = 3x(2 + 2x)
3 + 10x = (2 * 3x + 2x * 3x)
3 + 10x = (6x + 6x2)

Solving
3 + 10x = 6x + 6x2

Solving for variable 'x'.

Combine like terms: 10x + -6x = 4x
3 + 4x + -6x2 = 6x + 6x2 + -6x + -6x2

Reorder the terms:
3 + 4x + -6x2 = 6x + -6x + 6x2 + -6x2

Combine like terms: 6x + -6x = 0
3 + 4x + -6x2 = 0 + 6x2 + -6x2
3 + 4x + -6x2 = 6x2 + -6x2

Combine like terms: 6x2 + -6x2 = 0
3 + 4x + -6x2 = 0

Begin completing the square.  Divide all terms by
-6 the coefficient of the squared term: 

Divide each side by '-6'.
-0.5 + -0.6666666667x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -0.6666666667x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -0.6666666667x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -0.6666666667x + x2 = 0 + 0.5
-0.6666666667x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-0.6666666667x + x2 = 0.5

The x term is -0.6666666667x.  Take half its coefficient (-0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
-0.6666666667x + 0.1111111112 + x2 = 0.5 + 0.1111111112

Reorder the terms:
0.1111111112 + -0.6666666667x + x2 = 0.5 + 0.1111111112

Combine like terms: 0.5 + 0.1111111112 = 0.6111111112
0.1111111112 + -0.6666666667x + x2 = 0.6111111112

Factor a perfect square on the left side:
(x + -0.3333333334)(x + -0.3333333334) = 0.6111111112

Calculate the square root of the right side: 0.78173596

Break this problem into two subproblems by setting 
(x + -0.3333333334) equal to 0.78173596 and -0.78173596.

Subproblem 1

x + -0.3333333334 = 0.78173596 Simplifying x + -0.3333333334 = 0.78173596 Reorder the terms: -0.3333333334 + x = 0.78173596 Solving -0.3333333334 + x = 0.78173596 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = 0.78173596 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = 0.78173596 + 0.3333333334 x = 0.78173596 + 0.3333333334 Combine like terms: 0.78173596 + 0.3333333334 = 1.1150692934 x = 1.1150692934 Simplifying x = 1.1150692934

Subproblem 2

x + -0.3333333334 = -0.78173596 Simplifying x + -0.3333333334 = -0.78173596 Reorder the terms: -0.3333333334 + x = -0.78173596 Solving -0.3333333334 + x = -0.78173596 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = -0.78173596 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = -0.78173596 + 0.3333333334 x = -0.78173596 + 0.3333333334 Combine like terms: -0.78173596 + 0.3333333334 = -0.4484026266 x = -0.4484026266 Simplifying x = -0.4484026266

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.1150692934, -0.4484026266}

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