8 целых 9/13 -5х=3целых4/13
8 9/13 - 5х = 3 4/13 5х = 8 9/13 - 3 4/13 5х = 5 5/13 Х = 70/13 : 5 Х = 70/65 Х = 1 5/65 Х = 1 1/13