5x(x+8)-7(x-4)=5(x+8)(x-4)

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Solution for 5x(x+8)-7(x-4)=5(x+8)(x-4) equation:


Simplifying
5x(x + 8) + -7(x + -4) = 5(x + 8)(x + -4)

Reorder the terms:
5x(8 + x) + -7(x + -4) = 5(x + 8)(x + -4)
(8 * 5x + x * 5x) + -7(x + -4) = 5(x + 8)(x + -4)
(40x + 5x2) + -7(x + -4) = 5(x + 8)(x + -4)

Reorder the terms:
40x + 5x2 + -7(-4 + x) = 5(x + 8)(x + -4)
40x + 5x2 + (-4 * -7 + x * -7) = 5(x + 8)(x + -4)
40x + 5x2 + (28 + -7x) = 5(x + 8)(x + -4)

Reorder the terms:
28 + 40x + -7x + 5x2 = 5(x + 8)(x + -4)

Combine like terms: 40x + -7x = 33x
28 + 33x + 5x2 = 5(x + 8)(x + -4)

Reorder the terms:
28 + 33x + 5x2 = 5(8 + x)(x + -4)

Reorder the terms:
28 + 33x + 5x2 = 5(8 + x)(-4 + x)

Multiply (8 + x) * (-4 + x)
28 + 33x + 5x2 = 5(8(-4 + x) + x(-4 + x))
28 + 33x + 5x2 = 5((-4 * 8 + x * 8) + x(-4 + x))
28 + 33x + 5x2 = 5((-32 + 8x) + x(-4 + x))
28 + 33x + 5x2 = 5(-32 + 8x + (-4 * x + x * x))
28 + 33x + 5x2 = 5(-32 + 8x + (-4x + x2))

Combine like terms: 8x + -4x = 4x
28 + 33x + 5x2 = 5(-32 + 4x + x2)
28 + 33x + 5x2 = (-32 * 5 + 4x * 5 + x2 * 5)
28 + 33x + 5x2 = (-160 + 20x + 5x2)

Add '-5x2' to each side of the equation.
28 + 33x + 5x2 + -5x2 = -160 + 20x + 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
28 + 33x + 0 = -160 + 20x + 5x2 + -5x2
28 + 33x = -160 + 20x + 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
28 + 33x = -160 + 20x + 0
28 + 33x = -160 + 20x

Solving
28 + 33x = -160 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
28 + 33x + -20x = -160 + 20x + -20x

Combine like terms: 33x + -20x = 13x
28 + 13x = -160 + 20x + -20x

Combine like terms: 20x + -20x = 0
28 + 13x = -160 + 0
28 + 13x = -160

Add '-28' to each side of the equation.
28 + -28 + 13x = -160 + -28

Combine like terms: 28 + -28 = 0
0 + 13x = -160 + -28
13x = -160 + -28

Combine like terms: -160 + -28 = -188
13x = -188

Divide each side by '13'.
x = -14.46153846

Simplifying
x = -14.46153846

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