7x[4x-3(x-1)]=x+2

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Solution for 7x[4x-3(x-1)]=x+2 equation:


Simplifying
7x[4x + -3(x + -1)] = x + 2

Reorder the terms:
7x[4x + -3(-1 + x)] = x + 2
7x[4x + (-1 * -3 + x * -3)] = x + 2
7x[4x + (3 + -3x)] = x + 2

Reorder the terms:
7x[3 + 4x + -3x] = x + 2

Combine like terms: 4x + -3x = 1x
7x[3 + 1x] = x + 2
[3 * 7x + 1x * 7x] = x + 2
[21x + 7x2] = x + 2

Reorder the terms:
21x + 7x2 = 2 + x

Solving
21x + 7x2 = 2 + x

Solving for variable 'x'.

Reorder the terms:
-2 + 21x + -1x + 7x2 = 2 + x + -2 + -1x

Combine like terms: 21x + -1x = 20x
-2 + 20x + 7x2 = 2 + x + -2 + -1x

Reorder the terms:
-2 + 20x + 7x2 = 2 + -2 + x + -1x

Combine like terms: 2 + -2 = 0
-2 + 20x + 7x2 = 0 + x + -1x
-2 + 20x + 7x2 = x + -1x

Combine like terms: x + -1x = 0
-2 + 20x + 7x2 = 0

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

Divide each side by '7'.
-0.2857142857 + 2.857142857x + x2 = 0

Move the constant term to the right:

Add '0.2857142857' to each side of the equation.
-0.2857142857 + 2.857142857x + 0.2857142857 + x2 = 0 + 0.2857142857

Reorder the terms:
-0.2857142857 + 0.2857142857 + 2.857142857x + x2 = 0 + 0.2857142857

Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000
0.0000000000 + 2.857142857x + x2 = 0 + 0.2857142857
2.857142857x + x2 = 0 + 0.2857142857

Combine like terms: 0 + 0.2857142857 = 0.2857142857
2.857142857x + x2 = 0.2857142857

The x term is 2.857142857x.  Take half its coefficient (1.428571429).
Square it (2.040816328) and add it to both sides.

Add '2.040816328' to each side of the equation.
2.857142857x + 2.040816328 + x2 = 0.2857142857 + 2.040816328

Reorder the terms:
2.040816328 + 2.857142857x + x2 = 0.2857142857 + 2.040816328

Combine like terms: 0.2857142857 + 2.040816328 = 2.3265306137
2.040816328 + 2.857142857x + x2 = 2.3265306137

Factor a perfect square on the left side:
(x + 1.428571429)(x + 1.428571429) = 2.3265306137

Calculate the square root of the right side: 1.525296894

Break this problem into two subproblems by setting 
(x + 1.428571429) equal to 1.525296894 and -1.525296894.

Subproblem 1

x + 1.428571429 = 1.525296894 Simplifying x + 1.428571429 = 1.525296894 Reorder the terms: 1.428571429 + x = 1.525296894 Solving 1.428571429 + x = 1.525296894 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.428571429' to each side of the equation. 1.428571429 + -1.428571429 + x = 1.525296894 + -1.428571429 Combine like terms: 1.428571429 + -1.428571429 = 0.000000000 0.000000000 + x = 1.525296894 + -1.428571429 x = 1.525296894 + -1.428571429 Combine like terms: 1.525296894 + -1.428571429 = 0.096725465 x = 0.096725465 Simplifying x = 0.096725465

Subproblem 2

x + 1.428571429 = -1.525296894 Simplifying x + 1.428571429 = -1.525296894 Reorder the terms: 1.428571429 + x = -1.525296894 Solving 1.428571429 + x = -1.525296894 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.428571429' to each side of the equation. 1.428571429 + -1.428571429 + x = -1.525296894 + -1.428571429 Combine like terms: 1.428571429 + -1.428571429 = 0.000000000 0.000000000 + x = -1.525296894 + -1.428571429 x = -1.525296894 + -1.428571429 Combine like terms: -1.525296894 + -1.428571429 = -2.953868323 x = -2.953868323 Simplifying x = -2.953868323

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.096725465, -2.953868323}

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