(5x+3)(x+4)=5x(x-8)

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Solution for (5x+3)(x+4)=5x(x-8) equation:


Simplifying
(5x + 3)(x + 4) = 5x(x + -8)

Reorder the terms:
(3 + 5x)(x + 4) = 5x(x + -8)

Reorder the terms:
(3 + 5x)(4 + x) = 5x(x + -8)

Multiply (3 + 5x) * (4 + x)
(3(4 + x) + 5x * (4 + x)) = 5x(x + -8)
((4 * 3 + x * 3) + 5x * (4 + x)) = 5x(x + -8)
((12 + 3x) + 5x * (4 + x)) = 5x(x + -8)
(12 + 3x + (4 * 5x + x * 5x)) = 5x(x + -8)
(12 + 3x + (20x + 5x2)) = 5x(x + -8)

Combine like terms: 3x + 20x = 23x
(12 + 23x + 5x2) = 5x(x + -8)

Reorder the terms:
12 + 23x + 5x2 = 5x(-8 + x)
12 + 23x + 5x2 = (-8 * 5x + x * 5x)
12 + 23x + 5x2 = (-40x + 5x2)

Add '-5x2' to each side of the equation.
12 + 23x + 5x2 + -5x2 = -40x + 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
12 + 23x + 0 = -40x + 5x2 + -5x2
12 + 23x = -40x + 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
12 + 23x = -40x + 0
12 + 23x = -40x

Solving
12 + 23x = -40x

Solving for variable 'x'.

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

Add '40x' to each side of the equation.
12 + 23x + 40x = -40x + 40x

Combine like terms: 23x + 40x = 63x
12 + 63x = -40x + 40x

Combine like terms: -40x + 40x = 0
12 + 63x = 0

Add '-12' to each side of the equation.
12 + -12 + 63x = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 63x = 0 + -12
63x = 0 + -12

Combine like terms: 0 + -12 = -12
63x = -12

Divide each side by '63'.
x = -0.1904761905

Simplifying
x = -0.1904761905

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