160/x - 160 / (x+16) = 1/3

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