ОЧЕНЬ ОЧЕНЬ ОЧЕНЬ СРОЧНО!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 12 13/45 - ( у - 5 17/45) = 3 23/45
12 13/45-у+5 17/45=3 23/45 17 30/45-у=3 23/45 у= 17 30/45 - 3 23/45 у=14 7/45