Решите уравнение: 8 9/26 -z=5 7/39
8 9\26 - Z = 5 7\39 217/26-z=202/39 z=202/39- 217/26 z=404/78- 651/78 z=-247/78 z=3 13/78 z=3 1/6
8*9/26 - 5*7/39 = z217/26 - 202/39 = z 39 * 217 - 202 * 26 = z 26 * 39 8463 - 5252 = z 1014 z = 3211 1014