x(9x-9)=(9x+9)(x-4)

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Solution for x(9x-9)=(9x+9)(x-4) equation:


Simplifying
x(9x + -9) = (9x + 9)(x + -4)

Reorder the terms:
x(-9 + 9x) = (9x + 9)(x + -4)
(-9 * x + 9x * x) = (9x + 9)(x + -4)
(-9x + 9x2) = (9x + 9)(x + -4)

Reorder the terms:
-9x + 9x2 = (9 + 9x)(x + -4)

Reorder the terms:
-9x + 9x2 = (9 + 9x)(-4 + x)

Multiply (9 + 9x) * (-4 + x)
-9x + 9x2 = (9(-4 + x) + 9x * (-4 + x))
-9x + 9x2 = ((-4 * 9 + x * 9) + 9x * (-4 + x))
-9x + 9x2 = ((-36 + 9x) + 9x * (-4 + x))
-9x + 9x2 = (-36 + 9x + (-4 * 9x + x * 9x))
-9x + 9x2 = (-36 + 9x + (-36x + 9x2))

Combine like terms: 9x + -36x = -27x
-9x + 9x2 = (-36 + -27x + 9x2)

Add '-9x2' to each side of the equation.
-9x + 9x2 + -9x2 = -36 + -27x + 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0
-9x + 0 = -36 + -27x + 9x2 + -9x2
-9x = -36 + -27x + 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0
-9x = -36 + -27x + 0
-9x = -36 + -27x

Solving
-9x = -36 + -27x

Solving for variable 'x'.

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

Add '27x' to each side of the equation.
-9x + 27x = -36 + -27x + 27x

Combine like terms: -9x + 27x = 18x
18x = -36 + -27x + 27x

Combine like terms: -27x + 27x = 0
18x = -36 + 0
18x = -36

Divide each side by '18'.
x = -2

Simplifying
x = -2

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