Не могу решить пример помогите: 22374:(r-125)=1243 и второй 38007:(4223-t)=9

Рабочая тетрадь № 2 упр.:44)) годер*
Плиииз помогите:)) история)

Заполните пропуски соответсующими модальными глаголами: ( must, should,would,ought to,have to, needn't, can ,could,may)

1.They ... not do this work themselves

2.You...take my dictionary.

3/You don't look well, you...consult the doctor.

4.Why...I give you my money?

5.She ... not speak any foreign language.

6.He ...to help them,they need his help.

7 .   ...you tell me the time?

8.   ...I go with you?No, you...  .

9.Your daughter... have told about it.

10 In  winter we ...often skate.

11.You ...not miss your classes.

12. ...you play the piano before?

За 30 см шелка и 2,5 м шерсти заплатили 336 руб. 40 коп. Какова цена 1 м шерсти, если 1 м шелка стоит 58 руб?