39/48-(41/48-х)=5/48
39/48-(41/48-х)=5/48 41/48-х = 39/48-5/48 41/48-х =34/48 х = 41/48 - 34/48 х = 7/48 ------------------------------- 39/48-(41/48-7/48)=5/48 39/48 - 34/48 = 5/48 5/48 = 5/48