7x-6=0.5(36+x^2)

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Solution for 7x-6=0.5(36+x^2) equation:


Simplifying
7x + -6 = 0.5(36 + x2)

Reorder the terms:
-6 + 7x = 0.5(36 + x2)
-6 + 7x = (36 * 0.5 + x2 * 0.5)
-6 + 7x = (18 + 0.5x2)

Solving
-6 + 7x = 18 + 0.5x2

Solving for variable 'x'.

Reorder the terms:
-6 + -18 + 7x + -0.5x2 = 18 + 0.5x2 + -18 + -0.5x2

Combine like terms: -6 + -18 = -24
-24 + 7x + -0.5x2 = 18 + 0.5x2 + -18 + -0.5x2

Reorder the terms:
-24 + 7x + -0.5x2 = 18 + -18 + 0.5x2 + -0.5x2

Combine like terms: 18 + -18 = 0
-24 + 7x + -0.5x2 = 0 + 0.5x2 + -0.5x2
-24 + 7x + -0.5x2 = 0.5x2 + -0.5x2

Combine like terms: 0.5x2 + -0.5x2 = 0.0
-24 + 7x + -0.5x2 = 0.0

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
48 + -14x + x2 = 0

Move the constant term to the right:

Add '-48' to each side of the equation.
48 + -14x + -48 + x2 = 0 + -48

Reorder the terms:
48 + -48 + -14x + x2 = 0 + -48

Combine like terms: 48 + -48 = 0
0 + -14x + x2 = 0 + -48
-14x + x2 = 0 + -48

Combine like terms: 0 + -48 = -48
-14x + x2 = -48

The x term is -14x.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14x + 49 + x2 = -48 + 49

Reorder the terms:
49 + -14x + x2 = -48 + 49

Combine like terms: -48 + 49 = 1
49 + -14x + x2 = 1

Factor a perfect square on the left side:
(x + -7)(x + -7) = 1

Calculate the square root of the right side: 1

Break this problem into two subproblems by setting 
(x + -7) equal to 1 and -1.

Subproblem 1

x + -7 = 1 Simplifying x + -7 = 1 Reorder the terms: -7 + x = 1 Solving -7 + x = 1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = 1 + 7 Combine like terms: -7 + 7 = 0 0 + x = 1 + 7 x = 1 + 7 Combine like terms: 1 + 7 = 8 x = 8 Simplifying x = 8

Subproblem 2

x + -7 = -1 Simplifying x + -7 = -1 Reorder the terms: -7 + x = -1 Solving -7 + x = -1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = -1 + 7 Combine like terms: -7 + 7 = 0 0 + x = -1 + 7 x = -1 + 7 Combine like terms: -1 + 7 = 6 x = 6 Simplifying x = 6

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8, 6}

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