x(2x-8)=(2x+5)(x-9)

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Solution for x(2x-8)=(2x+5)(x-9) equation:


Simplifying
x(2x + -8) = (2x + 5)(x + -9)

Reorder the terms:
x(-8 + 2x) = (2x + 5)(x + -9)
(-8 * x + 2x * x) = (2x + 5)(x + -9)
(-8x + 2x2) = (2x + 5)(x + -9)

Reorder the terms:
-8x + 2x2 = (5 + 2x)(x + -9)

Reorder the terms:
-8x + 2x2 = (5 + 2x)(-9 + x)

Multiply (5 + 2x) * (-9 + x)
-8x + 2x2 = (5(-9 + x) + 2x * (-9 + x))
-8x + 2x2 = ((-9 * 5 + x * 5) + 2x * (-9 + x))
-8x + 2x2 = ((-45 + 5x) + 2x * (-9 + x))
-8x + 2x2 = (-45 + 5x + (-9 * 2x + x * 2x))
-8x + 2x2 = (-45 + 5x + (-18x + 2x2))

Combine like terms: 5x + -18x = -13x
-8x + 2x2 = (-45 + -13x + 2x2)

Add '-2x2' to each side of the equation.
-8x + 2x2 + -2x2 = -45 + -13x + 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-8x + 0 = -45 + -13x + 2x2 + -2x2
-8x = -45 + -13x + 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-8x = -45 + -13x + 0
-8x = -45 + -13x

Solving
-8x = -45 + -13x

Solving for variable 'x'.

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

Add '13x' to each side of the equation.
-8x + 13x = -45 + -13x + 13x

Combine like terms: -8x + 13x = 5x
5x = -45 + -13x + 13x

Combine like terms: -13x + 13x = 0
5x = -45 + 0
5x = -45

Divide each side by '5'.
x = -9

Simplifying
x = -9

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