160/x-160/(x+16)=1/3
(160(x+16)-160x)/(x(x+16))=1/3
160x+2560-160x/x(x+16)=1/3
7680=x^2+16x
x^2+16x-7680=0 ( делим на 16)
x^2/16+x-480=0
D=b^2-4ac=1+1/16*4*480=121
x1=-b-√D/2a=-1-11/(2*1/16)=-96
x2=-b+√D/2a=-1+11/(2*1/16)=10/0.125=80
ответ: x1=-96; x2=80