Помогите решить уравнение 50/50-x - 50/x =5/6

$\frac{50}{50-x} - \frac{50}{x} =\frac{5}{6} \\ \frac{50x-50(50-x)}{x(50-x)} = \frac{5}{6} \\ \frac{50x-2500+50x}{x(50-x)} = \frac{5}{6} \\ \frac{100x-2500}{x(50-x)} = \frac{5}{6} \\ 6(100x-2500)=5x(50-x)$
$600x-15000=250x-5x^2 \\ 120x-3000=50x-x^2 \\ x^2+70x-3000=0 \\ D=4900+12000=16900 \\ x_1= \frac{-70+130}{2} =30 \\ x_2= \frac{-70-130}{2} =100$
Ответ: 30 и 100