FX=(X-5)(4x+5)

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


Simplifying
FX = (X + -5)(4x + 5)

Reorder the terms:
FX = (-5 + X)(4x + 5)

Reorder the terms:
FX = (-5 + X)(5 + 4x)

Multiply (-5 + X) * (5 + 4x)
FX = (-5(5 + 4x) + X(5 + 4x))
FX = ((5 * -5 + 4x * -5) + X(5 + 4x))
FX = ((-25 + -20x) + X(5 + 4x))
FX = (-25 + -20x + (5 * X + 4x * X))
FX = (-25 + -20x + (5X + 4xX))

Reorder the terms:
FX = (-25 + 5X + -20x + 4xX)
FX = (-25 + 5X + -20x + 4xX)

Solving
FX = -25 + 5X + -20x + 4xX

Solving for variable 'F'.

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

Divide each side by 'X'.
F = -25X-1 + 5 + -20xX-1 + 4x

Simplifying
F = -25X-1 + 5 + -20xX-1 + 4x

Reorder the terms:
F = 5 + -25X-1 + 4x + -20xX-1

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