Что объединяет два произведения"Капитанская дочка"и"История Пугачёвского бунта"?

Упростите выражение: 1) 3х+7у-6х-4у 2)8а+(5-а)-(7+11а) 3)4-5(3с+8)

решите уравнение 9+13х=35+26х

II. Change the questions using Do you know…? Could you tell me…?

1. Why did they want to leave so soon?

2. How does this mechanism work?

3. What clothes should I take with me to America?

4. What is her E-mail?

5. How do you cook this tasty dish?

6. When has he gone to Paris?

Очень надо...