x(3x-9)=(3x+9)(x-5)

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Solution for x(3x-9)=(3x+9)(x-5) equation:


Simplifying
x(3x + -9) = (3x + 9)(x + -5)

Reorder the terms:
x(-9 + 3x) = (3x + 9)(x + -5)
(-9 * x + 3x * x) = (3x + 9)(x + -5)
(-9x + 3x2) = (3x + 9)(x + -5)

Reorder the terms:
-9x + 3x2 = (9 + 3x)(x + -5)

Reorder the terms:
-9x + 3x2 = (9 + 3x)(-5 + x)

Multiply (9 + 3x) * (-5 + x)
-9x + 3x2 = (9(-5 + x) + 3x * (-5 + x))
-9x + 3x2 = ((-5 * 9 + x * 9) + 3x * (-5 + x))
-9x + 3x2 = ((-45 + 9x) + 3x * (-5 + x))
-9x + 3x2 = (-45 + 9x + (-5 * 3x + x * 3x))
-9x + 3x2 = (-45 + 9x + (-15x + 3x2))

Combine like terms: 9x + -15x = -6x
-9x + 3x2 = (-45 + -6x + 3x2)

Add '-3x2' to each side of the equation.
-9x + 3x2 + -3x2 = -45 + -6x + 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-9x + 0 = -45 + -6x + 3x2 + -3x2
-9x = -45 + -6x + 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-9x = -45 + -6x + 0
-9x = -45 + -6x

Solving
-9x = -45 + -6x

Solving for variable 'x'.

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

Add '6x' to each side of the equation.
-9x + 6x = -45 + -6x + 6x

Combine like terms: -9x + 6x = -3x
-3x = -45 + -6x + 6x

Combine like terms: -6x + 6x = 0
-3x = -45 + 0
-3x = -45

Divide each side by '-3'.
x = 15

Simplifying
x = 15

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