60/x = 60/x+10 + 3/10 Срочно
60/x = 60/(x+10) + 3/10
60(10х+100)-600х=3х²+30х
600х+6000-600х-3х²-30х=0
-3х²-30х+6000=0
х²+10х-2000=0
х=-50; х=40.