x(5x-7)=(5x+9)(x-8)

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Solution for x(5x-7)=(5x+9)(x-8) equation:


Simplifying
x(5x + -7) = (5x + 9)(x + -8)

Reorder the terms:
x(-7 + 5x) = (5x + 9)(x + -8)
(-7 * x + 5x * x) = (5x + 9)(x + -8)
(-7x + 5x2) = (5x + 9)(x + -8)

Reorder the terms:
-7x + 5x2 = (9 + 5x)(x + -8)

Reorder the terms:
-7x + 5x2 = (9 + 5x)(-8 + x)

Multiply (9 + 5x) * (-8 + x)
-7x + 5x2 = (9(-8 + x) + 5x * (-8 + x))
-7x + 5x2 = ((-8 * 9 + x * 9) + 5x * (-8 + x))
-7x + 5x2 = ((-72 + 9x) + 5x * (-8 + x))
-7x + 5x2 = (-72 + 9x + (-8 * 5x + x * 5x))
-7x + 5x2 = (-72 + 9x + (-40x + 5x2))

Combine like terms: 9x + -40x = -31x
-7x + 5x2 = (-72 + -31x + 5x2)

Add '-5x2' to each side of the equation.
-7x + 5x2 + -5x2 = -72 + -31x + 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
-7x + 0 = -72 + -31x + 5x2 + -5x2
-7x = -72 + -31x + 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
-7x = -72 + -31x + 0
-7x = -72 + -31x

Solving
-7x = -72 + -31x

Solving for variable 'x'.

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

Add '31x' to each side of the equation.
-7x + 31x = -72 + -31x + 31x

Combine like terms: -7x + 31x = 24x
24x = -72 + -31x + 31x

Combine like terms: -31x + 31x = 0
24x = -72 + 0
24x = -72

Divide each side by '24'.
x = -3

Simplifying
x = -3

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