2(-x+3x)3(-x)+7=(-x)+(-3)

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Solution for 2(-x+3x)3(-x)+7=(-x)+(-3) equation:


Simplifying
2(-1x + 3x) * 3(-1x) + 7 = (-1x) + (-3)

Combine like terms: -1x + 3x = 2x
2(2x) * 3(-1x) + 7 = (-1x) + (-3)

Remove parenthesis around (2x)
2 * 2x * 3(-1x) + 7 = (-1x) + (-3)

Remove parenthesis around (-1x)
2 * 2x * 3 * -1x + 7 = (-1x) + (-3)

Reorder the terms for easier multiplication:
2 * 2 * 3 * -1x * x + 7 = (-1x) + (-3)

Multiply 2 * 2
4 * 3 * -1x * x + 7 = (-1x) + (-3)

Multiply 4 * 3
12 * -1x * x + 7 = (-1x) + (-3)

Multiply 12 * -1
-12x * x + 7 = (-1x) + (-3)

Multiply x * x
-12x2 + 7 = (-1x) + (-3)

Reorder the terms:
7 + -12x2 = (-1x) + (-3)
7 + -12x2 = (-1x) + -3

Reorder the terms:
7 + -12x2 = -3 + (-1x)

Solving
7 + -12x2 = -3 + (-1x)

Solving for variable 'x'.
7 + -12x2 + 3 + x = -3 + (-1x) + 3 + (x)

Reorder the terms:
7 + 3 + x + -12x2 = -3 + (-1x) + 3 + (x)

Combine like terms: 7 + 3 = 10
10 + x + -12x2 = -3 + (-1x) + 3 + (x)
10 + x + -12x2 = -3 + (-1x) + 3 + x

Reorder the terms:
10 + x + -12x2 = -3 + 3 + (-1x) + x

Combine like terms: -3 + 3 = 0
10 + x + -12x2 = 0 + (-1x) + x
10 + x + -12x2 = (-1x) + x

Combine like terms: (-1x) + x = 0
10 + x + -12x2 = 0

Begin completing the square.  Divide all terms by
-12 the coefficient of the squared term: 

Divide each side by '-12'.
-0.8333333333 + -0.08333333333x + x2 = 0

Move the constant term to the right:

Add '0.8333333333' to each side of the equation.
-0.8333333333 + -0.08333333333x + 0.8333333333 + x2 = 0 + 0.8333333333

Reorder the terms:
-0.8333333333 + 0.8333333333 + -0.08333333333x + x2 = 0 + 0.8333333333

Combine like terms: -0.8333333333 + 0.8333333333 = 0.0000000000
0.0000000000 + -0.08333333333x + x2 = 0 + 0.8333333333
-0.08333333333x + x2 = 0 + 0.8333333333

Combine like terms: 0 + 0.8333333333 = 0.8333333333
-0.08333333333x + x2 = 0.8333333333

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-0.08333333333x + 0.25 + x2 = 0.8333333333 + 0.25

Reorder the terms:
0.25 + -0.08333333333x + x2 = 0.8333333333 + 0.25

Combine like terms: 0.8333333333 + 0.25 = 1.0833333333
0.25 + -0.08333333333x + x2 = 1.0833333333

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 1.0833333333

Calculate the square root of the right side: 1.040833

Break this problem into two subproblems by setting 
(x + 0.5) equal to 1.040833 and -1.040833.

Subproblem 1

x + 0.5 = 1.040833 Simplifying x + 0.5 = 1.040833 Reorder the terms: 0.5 + x = 1.040833 Solving 0.5 + x = 1.040833 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 1.040833 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.040833 + -0.5 x = 1.040833 + -0.5 Combine like terms: 1.040833 + -0.5 = 0.540833 x = 0.540833 Simplifying x = 0.540833

Subproblem 2

x + 0.5 = -1.040833 Simplifying x + 0.5 = -1.040833 Reorder the terms: 0.5 + x = -1.040833 Solving 0.5 + x = -1.040833 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -1.040833 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.040833 + -0.5 x = -1.040833 + -0.5 Combine like terms: -1.040833 + -0.5 = -1.540833 x = -1.540833 Simplifying x = -1.540833

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.540833, -1.540833}

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