50/x - 50/x+85 = 17/6

50/x-50/x+85=17/6
50/x-50/x+85-17/6=0
300x+25500-300x-17x^2-1445x/6x(x+85)=0
-17x^2-1445x+25500=0    I*(-1)
17x^2+1445x-25500=0
Д=2088025-4*17*(-25500)=2088025+1734000=3822025 (1955)
x1=-1445+1955/2*17=510/34=15
x2=-1445-1955/34=-3400/34=-100
ответ: -100, 15

50 * 6 * ( X + 85 ) - 50 * 6X = 17 * ( X^2 + 85X ) ; X не равен 0 ; X не равен ( - 85 ) ; 300X + 25500 - 300X = 17X^2 + 1445 X ; 17X^2 + 1445X - 25500 = 0 ; X^2 + 85X - 1500 = 0 ; D = 7225 + 6000 = 13225 ; V D = 115 ; X1 = ( - 85 + 115 ) : 2 = 15 ; X2 = ( - 200 ) : 2 = ( - 100 ) ; ОТВЕТ 15 и ( - 100 )