(10x-1)5x=9

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Solution for (10x-1)5x=9 equation:


Simplifying
(10x + -1) * 5x = 9

Reorder the terms:
(-1 + 10x) * 5x = 9

Reorder the terms for easier multiplication:
5x(-1 + 10x) = 9
(-1 * 5x + 10x * 5x) = 9
(-5x + 50x2) = 9

Solving
-5x + 50x2 = 9

Solving for variable 'x'.

Reorder the terms:
-9 + -5x + 50x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + -5x + 50x2 = 0

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

Divide each side by '50'.
-0.18 + -0.1x + x2 = 0.0

Move the constant term to the right:

Add '0.18' to each side of the equation.
-0.18 + -0.1x + 0.18 + x2 = 0.0 + 0.18

Reorder the terms:
-0.18 + 0.18 + -0.1x + x2 = 0.0 + 0.18

Combine like terms: -0.18 + 0.18 = 0.00
0.00 + -0.1x + x2 = 0.0 + 0.18
-0.1x + x2 = 0.0 + 0.18

Combine like terms: 0.0 + 0.18 = 0.18
-0.1x + x2 = 0.18

The x term is -0.1x.  Take half its coefficient (-0.05).
Square it (0.0025) and add it to both sides.

Add '0.0025' to each side of the equation.
-0.1x + 0.0025 + x2 = 0.18 + 0.0025

Reorder the terms:
0.0025 + -0.1x + x2 = 0.18 + 0.0025

Combine like terms: 0.18 + 0.0025 = 0.1825
0.0025 + -0.1x + x2 = 0.1825

Factor a perfect square on the left side:
(x + -0.05)(x + -0.05) = 0.1825

Calculate the square root of the right side: 0.427200187

Break this problem into two subproblems by setting 
(x + -0.05) equal to 0.427200187 and -0.427200187.

Subproblem 1

x + -0.05 = 0.427200187 Simplifying x + -0.05 = 0.427200187 Reorder the terms: -0.05 + x = 0.427200187 Solving -0.05 + x = 0.427200187 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.05' to each side of the equation. -0.05 + 0.05 + x = 0.427200187 + 0.05 Combine like terms: -0.05 + 0.05 = 0.00 0.00 + x = 0.427200187 + 0.05 x = 0.427200187 + 0.05 Combine like terms: 0.427200187 + 0.05 = 0.477200187 x = 0.477200187 Simplifying x = 0.477200187

Subproblem 2

x + -0.05 = -0.427200187 Simplifying x + -0.05 = -0.427200187 Reorder the terms: -0.05 + x = -0.427200187 Solving -0.05 + x = -0.427200187 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.05' to each side of the equation. -0.05 + 0.05 + x = -0.427200187 + 0.05 Combine like terms: -0.05 + 0.05 = 0.00 0.00 + x = -0.427200187 + 0.05 x = -0.427200187 + 0.05 Combine like terms: -0.427200187 + 0.05 = -0.377200187 x = -0.377200187 Simplifying x = -0.377200187

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.477200187, -0.377200187}

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