Ответ:

™™™™™™™™™™™™™™™™™™™™™™

Ответ:

1) х=15/19 - 9/19

х=6/19

2) х=33/45-19/33

х= 363/495 - 285/495

х=78/495=26/165

3) 19/67+х/67=28/67-36/67

19/67+х/67=-8/67

х/67=-8/67-19/67

х/67=-27/67