составить меню бедного русича

Решите уравнение:

29х+15х+16=100

Соствавьте 1-2 диалога с использование этих idioms

1 at the head of the table

2 to keep your head

3 to take something into your head

4 to have a good head on your shoulders

5 to lose your head

6 to knock your head against a brick wall

7 to talk your head off

8 to have your head in che clouds

9 to bury your head in the sand

10 to be head over heels in love

11 to turn someone's head

Экспериментально установите,взаимодействует ли феррум сульфат с:
а)щёлочью;
б)медью;
в)барий хлоридом.