x(2x-4)=(2x+5)(x-4)

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Solution for x(2x-4)=(2x+5)(x-4) equation:


Simplifying
x(2x + -4) = (2x + 5)(x + -4)

Reorder the terms:
x(-4 + 2x) = (2x + 5)(x + -4)
(-4 * x + 2x * x) = (2x + 5)(x + -4)
(-4x + 2x2) = (2x + 5)(x + -4)

Reorder the terms:
-4x + 2x2 = (5 + 2x)(x + -4)

Reorder the terms:
-4x + 2x2 = (5 + 2x)(-4 + x)

Multiply (5 + 2x) * (-4 + x)
-4x + 2x2 = (5(-4 + x) + 2x * (-4 + x))
-4x + 2x2 = ((-4 * 5 + x * 5) + 2x * (-4 + x))
-4x + 2x2 = ((-20 + 5x) + 2x * (-4 + x))
-4x + 2x2 = (-20 + 5x + (-4 * 2x + x * 2x))
-4x + 2x2 = (-20 + 5x + (-8x + 2x2))

Combine like terms: 5x + -8x = -3x
-4x + 2x2 = (-20 + -3x + 2x2)

Add '-2x2' to each side of the equation.
-4x + 2x2 + -2x2 = -20 + -3x + 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-4x + 0 = -20 + -3x + 2x2 + -2x2
-4x = -20 + -3x + 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-4x = -20 + -3x + 0
-4x = -20 + -3x

Solving
-4x = -20 + -3x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3x' to each side of the equation.
-4x + 3x = -20 + -3x + 3x

Combine like terms: -4x + 3x = -1x
-1x = -20 + -3x + 3x

Combine like terms: -3x + 3x = 0
-1x = -20 + 0
-1x = -20

Divide each side by '-1'.
x = 20

Simplifying
x = 20

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