5(x+2)7x=23

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Solution for 5(x+2)7x=23 equation:


Simplifying
5(x + 2) * 7x = 23

Reorder the terms:
5(2 + x) * 7x = 23

Reorder the terms for easier multiplication:
5 * 7x(2 + x) = 23

Multiply 5 * 7
35x(2 + x) = 23
(2 * 35x + x * 35x) = 23
(70x + 35x2) = 23

Solving
70x + 35x2 = 23

Solving for variable 'x'.

Reorder the terms:
-23 + 70x + 35x2 = 23 + -23

Combine like terms: 23 + -23 = 0
-23 + 70x + 35x2 = 0

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

Divide each side by '35'.
-0.6571428571 + 2x + x2 = 0

Move the constant term to the right:

Add '0.6571428571' to each side of the equation.
-0.6571428571 + 2x + 0.6571428571 + x2 = 0 + 0.6571428571

Reorder the terms:
-0.6571428571 + 0.6571428571 + 2x + x2 = 0 + 0.6571428571

Combine like terms: -0.6571428571 + 0.6571428571 = 0.0000000000
0.0000000000 + 2x + x2 = 0 + 0.6571428571
2x + x2 = 0 + 0.6571428571

Combine like terms: 0 + 0.6571428571 = 0.6571428571
2x + x2 = 0.6571428571

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 0.6571428571 + 1

Reorder the terms:
1 + 2x + x2 = 0.6571428571 + 1

Combine like terms: 0.6571428571 + 1 = 1.6571428571
1 + 2x + x2 = 1.6571428571

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.6571428571

Calculate the square root of the right side: 1.287300609

Break this problem into two subproblems by setting 
(x + 1) equal to 1.287300609 and -1.287300609.

Subproblem 1

x + 1 = 1.287300609 Simplifying x + 1 = 1.287300609 Reorder the terms: 1 + x = 1.287300609 Solving 1 + x = 1.287300609 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.287300609 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.287300609 + -1 x = 1.287300609 + -1 Combine like terms: 1.287300609 + -1 = 0.287300609 x = 0.287300609 Simplifying x = 0.287300609

Subproblem 2

x + 1 = -1.287300609 Simplifying x + 1 = -1.287300609 Reorder the terms: 1 + x = -1.287300609 Solving 1 + x = -1.287300609 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.287300609 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.287300609 + -1 x = -1.287300609 + -1 Combine like terms: -1.287300609 + -1 = -2.287300609 x = -2.287300609 Simplifying x = -2.287300609

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.287300609, -2.287300609}

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