Решите уравнение 8целых 9/26 - z = 5целых 7/39
8 9/26-z==5 7/39 z=8 9/26-5 7/39=3 54/156- 28/156=3 26/156=3 13/78=3 1/6 z=3 1/6
8 9/26 - z = 5 7/39 - z = 202/39 - 217/26 - z = ( 404 - 651) / 78 - z = - 247 / 78 ( сокращаем на 13) - z = -19 / 6 z = 19/6 z = 3 целых 1/6