7(6X-1)X=36

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Solution for 7(6X-1)X=36 equation:


Simplifying
7(6X + -1) * X = 36

Reorder the terms:
7(-1 + 6X) * X = 36

Reorder the terms for easier multiplication:
7X(-1 + 6X) = 36
(-1 * 7X + 6X * 7X) = 36
(-7X + 42X2) = 36

Solving
-7X + 42X2 = 36

Solving for variable 'X'.

Reorder the terms:
-36 + -7X + 42X2 = 36 + -36

Combine like terms: 36 + -36 = 0
-36 + -7X + 42X2 = 0

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

Divide each side by '42'.
-0.8571428571 + -0.1666666667X + X2 = 0

Move the constant term to the right:

Add '0.8571428571' to each side of the equation.
-0.8571428571 + -0.1666666667X + 0.8571428571 + X2 = 0 + 0.8571428571

Reorder the terms:
-0.8571428571 + 0.8571428571 + -0.1666666667X + X2 = 0 + 0.8571428571

Combine like terms: -0.8571428571 + 0.8571428571 = 0.0000000000
0.0000000000 + -0.1666666667X + X2 = 0 + 0.8571428571
-0.1666666667X + X2 = 0 + 0.8571428571

Combine like terms: 0 + 0.8571428571 = 0.8571428571
-0.1666666667X + X2 = 0.8571428571

The X term is -0.1666666667X.  Take half its coefficient (-0.08333333335).
Square it (0.006944444447) and add it to both sides.

Add '0.006944444447' to each side of the equation.
-0.1666666667X + 0.006944444447 + X2 = 0.8571428571 + 0.006944444447

Reorder the terms:
0.006944444447 + -0.1666666667X + X2 = 0.8571428571 + 0.006944444447

Combine like terms: 0.8571428571 + 0.006944444447 = 0.864087301547
0.006944444447 + -0.1666666667X + X2 = 0.864087301547

Factor a perfect square on the left side:
(X + -0.08333333335)(X + -0.08333333335) = 0.864087301547

Calculate the square root of the right side: 0.929562963

Break this problem into two subproblems by setting 
(X + -0.08333333335) equal to 0.929562963 and -0.929562963.

Subproblem 1

X + -0.08333333335 = 0.929562963 Simplifying X + -0.08333333335 = 0.929562963 Reorder the terms: -0.08333333335 + X = 0.929562963 Solving -0.08333333335 + X = 0.929562963 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.08333333335' to each side of the equation. -0.08333333335 + 0.08333333335 + X = 0.929562963 + 0.08333333335 Combine like terms: -0.08333333335 + 0.08333333335 = 0.00000000000 0.00000000000 + X = 0.929562963 + 0.08333333335 X = 0.929562963 + 0.08333333335 Combine like terms: 0.929562963 + 0.08333333335 = 1.01289629635 X = 1.01289629635 Simplifying X = 1.01289629635

Subproblem 2

X + -0.08333333335 = -0.929562963 Simplifying X + -0.08333333335 = -0.929562963 Reorder the terms: -0.08333333335 + X = -0.929562963 Solving -0.08333333335 + X = -0.929562963 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.08333333335' to each side of the equation. -0.08333333335 + 0.08333333335 + X = -0.929562963 + 0.08333333335 Combine like terms: -0.08333333335 + 0.08333333335 = 0.00000000000 0.00000000000 + X = -0.929562963 + 0.08333333335 X = -0.929562963 + 0.08333333335 Combine like terms: -0.929562963 + 0.08333333335 = -0.84622962965 X = -0.84622962965 Simplifying X = -0.84622962965

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1.01289629635, -0.84622962965}

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