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

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


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

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

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

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

Multiply (5 + 4x) * (-4 + x)
-7x + 4x2 = (5(-4 + x) + 4x * (-4 + x))
-7x + 4x2 = ((-4 * 5 + x * 5) + 4x * (-4 + x))
-7x + 4x2 = ((-20 + 5x) + 4x * (-4 + x))
-7x + 4x2 = (-20 + 5x + (-4 * 4x + x * 4x))
-7x + 4x2 = (-20 + 5x + (-16x + 4x2))

Combine like terms: 5x + -16x = -11x
-7x + 4x2 = (-20 + -11x + 4x2)

Add '-4x2' to each side of the equation.
-7x + 4x2 + -4x2 = -20 + -11x + 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-7x + 0 = -20 + -11x + 4x2 + -4x2
-7x = -20 + -11x + 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-7x = -20 + -11x + 0
-7x = -20 + -11x

Solving
-7x = -20 + -11x

Solving for variable 'x'.

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

Add '11x' to each side of the equation.
-7x + 11x = -20 + -11x + 11x

Combine like terms: -7x + 11x = 4x
4x = -20 + -11x + 11x

Combine like terms: -11x + 11x = 0
4x = -20 + 0
4x = -20

Divide each side by '4'.
x = -5

Simplifying
x = -5

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