(x-1)(x+3)=(x+5)(x-4)

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Solution for (x-1)(x+3)=(x+5)(x-4) equation:


Simplifying
(x + -1)(x + 3) = (x + 5)(x + -4)

Reorder the terms:
(-1 + x)(x + 3) = (x + 5)(x + -4)

Reorder the terms:
(-1 + x)(3 + x) = (x + 5)(x + -4)

Multiply (-1 + x) * (3 + x)
(-1(3 + x) + x(3 + x)) = (x + 5)(x + -4)
((3 * -1 + x * -1) + x(3 + x)) = (x + 5)(x + -4)
((-3 + -1x) + x(3 + x)) = (x + 5)(x + -4)
(-3 + -1x + (3 * x + x * x)) = (x + 5)(x + -4)
(-3 + -1x + (3x + x2)) = (x + 5)(x + -4)

Combine like terms: -1x + 3x = 2x
(-3 + 2x + x2) = (x + 5)(x + -4)

Reorder the terms:
-3 + 2x + x2 = (5 + x)(x + -4)

Reorder the terms:
-3 + 2x + x2 = (5 + x)(-4 + x)

Multiply (5 + x) * (-4 + x)
-3 + 2x + x2 = (5(-4 + x) + x(-4 + x))
-3 + 2x + x2 = ((-4 * 5 + x * 5) + x(-4 + x))
-3 + 2x + x2 = ((-20 + 5x) + x(-4 + x))
-3 + 2x + x2 = (-20 + 5x + (-4 * x + x * x))
-3 + 2x + x2 = (-20 + 5x + (-4x + x2))

Combine like terms: 5x + -4x = 1x
-3 + 2x + x2 = (-20 + 1x + x2)

Add '-1x2' to each side of the equation.
-3 + 2x + x2 + -1x2 = -20 + 1x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-3 + 2x + 0 = -20 + 1x + x2 + -1x2
-3 + 2x = -20 + 1x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-3 + 2x = -20 + 1x + 0
-3 + 2x = -20 + 1x

Solving
-3 + 2x = -20 + 1x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-3 + 2x + -1x = -20 + 1x + -1x

Combine like terms: 2x + -1x = 1x
-3 + 1x = -20 + 1x + -1x

Combine like terms: 1x + -1x = 0
-3 + 1x = -20 + 0
-3 + 1x = -20

Add '3' to each side of the equation.
-3 + 3 + 1x = -20 + 3

Combine like terms: -3 + 3 = 0
0 + 1x = -20 + 3
1x = -20 + 3

Combine like terms: -20 + 3 = -17
1x = -17

Divide each side by '1'.
x = -17

Simplifying
x = -17

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