20625=x(29-.01x)

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Solution for 20625=x(29-.01x) equation:


Simplifying
20625 = x(29 + -0.01x)
20625 = (29 * x + -0.01x * x)
20625 = (29x + -0.01x2)

Solving
20625 = 29x + -0.01x2

Solving for variable 'x'.

Reorder the terms:
20625 + -29x + 0.01x2 = 29x + -29x + -0.01x2 + 0.01x2

Combine like terms: 29x + -29x = 0
20625 + -29x + 0.01x2 = 0 + -0.01x2 + 0.01x2
20625 + -29x + 0.01x2 = -0.01x2 + 0.01x2

Combine like terms: -0.01x2 + 0.01x2 = 0.00
20625 + -29x + 0.01x2 = 0.00

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

Divide each side by '0.01'.
2062500 + -2900x + x2 = 0

Move the constant term to the right:

Add '-2062500' to each side of the equation.
2062500 + -2900x + -2062500 + x2 = 0 + -2062500

Reorder the terms:
2062500 + -2062500 + -2900x + x2 = 0 + -2062500

Combine like terms: 2062500 + -2062500 = 0
0 + -2900x + x2 = 0 + -2062500
-2900x + x2 = 0 + -2062500

Combine like terms: 0 + -2062500 = -2062500
-2900x + x2 = -2062500

The x term is -2900x.  Take half its coefficient (-1450).
Square it (2102500) and add it to both sides.

Add '2102500' to each side of the equation.
-2900x + 2102500 + x2 = -2062500 + 2102500

Reorder the terms:
2102500 + -2900x + x2 = -2062500 + 2102500

Combine like terms: -2062500 + 2102500 = 40000
2102500 + -2900x + x2 = 40000

Factor a perfect square on the left side:
(x + -1450)(x + -1450) = 40000

Calculate the square root of the right side: 200

Break this problem into two subproblems by setting 
(x + -1450) equal to 200 and -200.

Subproblem 1

x + -1450 = 200 Simplifying x + -1450 = 200 Reorder the terms: -1450 + x = 200 Solving -1450 + x = 200 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1450' to each side of the equation. -1450 + 1450 + x = 200 + 1450 Combine like terms: -1450 + 1450 = 0 0 + x = 200 + 1450 x = 200 + 1450 Combine like terms: 200 + 1450 = 1650 x = 1650 Simplifying x = 1650

Subproblem 2

x + -1450 = -200 Simplifying x + -1450 = -200 Reorder the terms: -1450 + x = -200 Solving -1450 + x = -200 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1450' to each side of the equation. -1450 + 1450 + x = -200 + 1450 Combine like terms: -1450 + 1450 = 0 0 + x = -200 + 1450 x = -200 + 1450 Combine like terms: -200 + 1450 = 1250 x = 1250 Simplifying x = 1250

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1650, 1250}

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