х · 2 7/19 = 7 4/23 2 1/19 · х = 7/37
х · 45/19 = 165/23 39/19 · х = 7/37
х = 165/23 : 45/19 х = 7/37 : 39/19
х = 165/23 · 19/45 х = 7/37 · 19/39
х = (11·19)/(23·3) х = 133/1443
х = 209/69
х = 3 целых 2/69
