x(200-2x)=5000

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Solution for x(200-2x)=5000 equation: 



x(200-2x)=5000

We move all terms to the left:

x(200-2x)-(5000)=0

We add all the numbers together, and all the variables

x(-2x+200)-5000=0

We multiply parentheses

-2x^2+200x-5000=0

a = -2; b = 200; c = -5000;
Δ = b2-4ac
Δ = 2002-4·(-2)·(-5000)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-200}{-4}=+50$

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