56-(3x-14)=3x(x+7)+x

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Solution for 56-(3x-14)=3x(x+7)+x equation:


Simplifying
56 + -1(3x + -14) = 3x(x + 7) + x

Reorder the terms:
56 + -1(-14 + 3x) = 3x(x + 7) + x
56 + (-14 * -1 + 3x * -1) = 3x(x + 7) + x
56 + (14 + -3x) = 3x(x + 7) + x

Combine like terms: 56 + 14 = 70
70 + -3x = 3x(x + 7) + x

Reorder the terms:
70 + -3x = 3x(7 + x) + x
70 + -3x = (7 * 3x + x * 3x) + x
70 + -3x = (21x + 3x2) + x

Reorder the terms:
70 + -3x = 21x + x + 3x2

Combine like terms: 21x + x = 22x
70 + -3x = 22x + 3x2

Solving
70 + -3x = 22x + 3x2

Solving for variable 'x'.

Combine like terms: -3x + -22x = -25x
70 + -25x + -3x2 = 22x + 3x2 + -22x + -3x2

Reorder the terms:
70 + -25x + -3x2 = 22x + -22x + 3x2 + -3x2

Combine like terms: 22x + -22x = 0
70 + -25x + -3x2 = 0 + 3x2 + -3x2
70 + -25x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
70 + -25x + -3x2 = 0

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

Divide each side by '-3'.
-23.33333333 + 8.333333333x + x2 = 0

Move the constant term to the right:

Add '23.33333333' to each side of the equation.
-23.33333333 + 8.333333333x + 23.33333333 + x2 = 0 + 23.33333333

Reorder the terms:
-23.33333333 + 23.33333333 + 8.333333333x + x2 = 0 + 23.33333333

Combine like terms: -23.33333333 + 23.33333333 = 0.00000000
0.00000000 + 8.333333333x + x2 = 0 + 23.33333333
8.333333333x + x2 = 0 + 23.33333333

Combine like terms: 0 + 23.33333333 = 23.33333333
8.333333333x + x2 = 23.33333333

The x term is 8.333333333x.  Take half its coefficient (4.166666667).
Square it (17.36111111) and add it to both sides.

Add '17.36111111' to each side of the equation.
8.333333333x + 17.36111111 + x2 = 23.33333333 + 17.36111111

Reorder the terms:
17.36111111 + 8.333333333x + x2 = 23.33333333 + 17.36111111

Combine like terms: 23.33333333 + 17.36111111 = 40.69444444
17.36111111 + 8.333333333x + x2 = 40.69444444

Factor a perfect square on the left side:
(x + 4.166666667)(x + 4.166666667) = 40.69444444

Calculate the square root of the right side: 6.379219736

Break this problem into two subproblems by setting 
(x + 4.166666667) equal to 6.379219736 and -6.379219736.

Subproblem 1

x + 4.166666667 = 6.379219736 Simplifying x + 4.166666667 = 6.379219736 Reorder the terms: 4.166666667 + x = 6.379219736 Solving 4.166666667 + x = 6.379219736 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.166666667' to each side of the equation. 4.166666667 + -4.166666667 + x = 6.379219736 + -4.166666667 Combine like terms: 4.166666667 + -4.166666667 = 0.000000000 0.000000000 + x = 6.379219736 + -4.166666667 x = 6.379219736 + -4.166666667 Combine like terms: 6.379219736 + -4.166666667 = 2.212553069 x = 2.212553069 Simplifying x = 2.212553069

Subproblem 2

x + 4.166666667 = -6.379219736 Simplifying x + 4.166666667 = -6.379219736 Reorder the terms: 4.166666667 + x = -6.379219736 Solving 4.166666667 + x = -6.379219736 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.166666667' to each side of the equation. 4.166666667 + -4.166666667 + x = -6.379219736 + -4.166666667 Combine like terms: 4.166666667 + -4.166666667 = 0.000000000 0.000000000 + x = -6.379219736 + -4.166666667 x = -6.379219736 + -4.166666667 Combine like terms: -6.379219736 + -4.166666667 = -10.545886403 x = -10.545886403 Simplifying x = -10.545886403

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.212553069, -10.545886403}

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