2x5=10 (chân)

Ô tô xuất phát từ Hà Nội lúc:

10 giờ 15 phút-1 giờ 55 phút=9 giờ 40 phút

Đáp số:9 giờ 40 phút
 

4,0012m3 nhe ban hi...hi... 

1. Tan is very slow. He is late for school.

-->Tan is very slow so he is for school

2. The man speaks loudly. He wants everyone to hear him clearly.

-->The man wants everyone hear him clearly so he speaks more loudly

3. This exercise is easier than that one

-->This exercise is not as difficult as that one

4. we wrote this letter for 2 hours.

-->It took us 2 hours to write this letter

5. i spend a day painting this house.

-->It takes me a day to paint this house

6. Dogs are difficult to train

-->Training dogs are difficult

7. They think that learning English are not easy.

-->Learning English are difficult for them

Mình cần cả lời giải nữa cơ ! 

a)Helan said ''Shirlery, where you have cut your hair?''

b)''Please you could repeat what you had said''

1)If you you took exercise,you wouldn't feel unheathy

2)I haven't written to my pen friend for two months

ý bạn a và b là 1 hệ pt hả chứ để riêng sao giải. Nếu giải hệ thì là như sau:

5x-y=13<=> y=5x-13. Thay vào pt b ta có: 23x+53(5x-13)=109 <=> 23x+265x=109+53.13. đến đây bạn tự giải