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

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


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

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

Reorder the terms:
-20x + 5x2 + 2(-20 + 5x) = 5(5x + -20)
-20x + 5x2 + (-20 * 2 + 5x * 2) = 5(5x + -20)
-20x + 5x2 + (-40 + 10x) = 5(5x + -20)

Reorder the terms:
-40 + -20x + 10x + 5x2 = 5(5x + -20)

Combine like terms: -20x + 10x = -10x
-40 + -10x + 5x2 = 5(5x + -20)

Reorder the terms:
-40 + -10x + 5x2 = 5(-20 + 5x)
-40 + -10x + 5x2 = (-20 * 5 + 5x * 5)
-40 + -10x + 5x2 = (-100 + 25x)

Solving
-40 + -10x + 5x2 = -100 + 25x

Solving for variable 'x'.

Reorder the terms:
-40 + 100 + -10x + -25x + 5x2 = -100 + 25x + 100 + -25x

Combine like terms: -40 + 100 = 60
60 + -10x + -25x + 5x2 = -100 + 25x + 100 + -25x

Combine like terms: -10x + -25x = -35x
60 + -35x + 5x2 = -100 + 25x + 100 + -25x

Reorder the terms:
60 + -35x + 5x2 = -100 + 100 + 25x + -25x

Combine like terms: -100 + 100 = 0
60 + -35x + 5x2 = 0 + 25x + -25x
60 + -35x + 5x2 = 25x + -25x

Combine like terms: 25x + -25x = 0
60 + -35x + 5x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(12 + -7x + x2) = 0

Factor a trinomial.
5((3 + -1x)(4 + -1x)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Subproblem 2

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {3, 4}

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