(x+9)(x-3)=(2x+1)(x-3)

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Solution for (x+9)(x-3)=(2x+1)(x-3) equation: 


Simplifying
(x + 9)(x + -3) = (2x + 1)(x + -3)

Reorder the terms:
(9 + x)(x + -3) = (2x + 1)(x + -3)

Reorder the terms:
(9 + x)(-3 + x) = (2x + 1)(x + -3)

Multiply (9 + x) * (-3 + x)
(9(-3 + x) + x(-3 + x)) = (2x + 1)(x + -3)
((-3 * 9 + x * 9) + x(-3 + x)) = (2x + 1)(x + -3)
((-27 + 9x) + x(-3 + x)) = (2x + 1)(x + -3)
(-27 + 9x + (-3 * x + x * x)) = (2x + 1)(x + -3)
(-27 + 9x + (-3x + x2)) = (2x + 1)(x + -3)

Combine like terms: 9x + -3x = 6x
(-27 + 6x + x2) = (2x + 1)(x + -3)

Reorder the terms:
-27 + 6x + x2 = (1 + 2x)(x + -3)

Reorder the terms:
-27 + 6x + x2 = (1 + 2x)(-3 + x)

Multiply (1 + 2x) * (-3 + x)
-27 + 6x + x2 = (1(-3 + x) + 2x * (-3 + x))
-27 + 6x + x2 = ((-3 * 1 + x * 1) + 2x * (-3 + x))
-27 + 6x + x2 = ((-3 + 1x) + 2x * (-3 + x))
-27 + 6x + x2 = (-3 + 1x + (-3 * 2x + x * 2x))
-27 + 6x + x2 = (-3 + 1x + (-6x + 2x2))

Combine like terms: 1x + -6x = -5x
-27 + 6x + x2 = (-3 + -5x + 2x2)

Solving
-27 + 6x + x2 = -3 + -5x + 2x2

Solving for variable 'x'.

Reorder the terms:
-27 + 3 + 6x + 5x + x2 + -2x2 = -3 + -5x + 2x2 + 3 + 5x + -2x2

Combine like terms: -27 + 3 = -24
-24 + 6x + 5x + x2 + -2x2 = -3 + -5x + 2x2 + 3 + 5x + -2x2

Combine like terms: 6x + 5x = 11x
-24 + 11x + x2 + -2x2 = -3 + -5x + 2x2 + 3 + 5x + -2x2

Combine like terms: x2 + -2x2 = -1x2
-24 + 11x + -1x2 = -3 + -5x + 2x2 + 3 + 5x + -2x2

Reorder the terms:
-24 + 11x + -1x2 = -3 + 3 + -5x + 5x + 2x2 + -2x2

Combine like terms: -3 + 3 = 0
-24 + 11x + -1x2 = 0 + -5x + 5x + 2x2 + -2x2
-24 + 11x + -1x2 = -5x + 5x + 2x2 + -2x2

Combine like terms: -5x + 5x = 0
-24 + 11x + -1x2 = 0 + 2x2 + -2x2
-24 + 11x + -1x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-24 + 11x + -1x2 = 0

Factor a trinomial.
(-8 + x)(3 + -1x) = 0


Subproblem 1
Set the factor '(-8 + x)' equal to zero and attempt to solve:

Simplifying
-8 + x = 0

Solving
-8 + x = 0

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

Add '8' to each side of the equation.
-8 + 8 + x = 0 + 8

Combine like terms: -8 + 8 = 0
0 + x = 0 + 8
x = 0 + 8

Combine like terms: 0 + 8 = 8
x = 8

Simplifying
x = 8

Subproblem 2
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
Solution
x = {8, 3}

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