x(x+20)=20(2x-5)

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Solution for x(x+20)=20(2x-5) equation:


Simplifying
x(x + 20) = 20(2x + -5)

Reorder the terms:
x(20 + x) = 20(2x + -5)
(20 * x + x * x) = 20(2x + -5)
(20x + x2) = 20(2x + -5)

Reorder the terms:
20x + x2 = 20(-5 + 2x)
20x + x2 = (-5 * 20 + 2x * 20)
20x + x2 = (-100 + 40x)

Solving
20x + x2 = -100 + 40x

Solving for variable 'x'.

Reorder the terms:
100 + 20x + -40x + x2 = -100 + 40x + 100 + -40x

Combine like terms: 20x + -40x = -20x
100 + -20x + x2 = -100 + 40x + 100 + -40x

Reorder the terms:
100 + -20x + x2 = -100 + 100 + 40x + -40x

Combine like terms: -100 + 100 = 0
100 + -20x + x2 = 0 + 40x + -40x
100 + -20x + x2 = 40x + -40x

Combine like terms: 40x + -40x = 0
100 + -20x + x2 = 0

Factor a trinomial.
(10 + -1x)(10 + -1x) = 0

Subproblem 1

Set the factor '(10 + -1x)' equal to zero and attempt to solve: Simplifying 10 + -1x = 0 Solving 10 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -1x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -1x = 0 + -10 -1x = 0 + -10 Combine like terms: 0 + -10 = -10 -1x = -10 Divide each side by '-1'. x = 10 Simplifying x = 10

Subproblem 2

Set the factor '(10 + -1x)' equal to zero and attempt to solve: Simplifying 10 + -1x = 0 Solving 10 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -1x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -1x = 0 + -10 -1x = 0 + -10 Combine like terms: 0 + -10 = -10 -1x = -10 Divide each side by '-1'. x = 10 Simplifying x = 10

Solution

x = {10, 10}

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