=> 4x=1+2+3+2+9=17

=> x=17/4

1. I always spend half an hour doing my homework.

It always takes me half an hour to do my homework.

2. How lovely is the dress !

What a lovely dress!

3. I like video games better than computer games.

I prefer video game to computer game.

4. The blue hat is more expensive than the yellow one.

The yellow hat is cheaper than th blue one.

5. We'll have avacation that lasts for eight weeks.

We'll have an eight-week vacation .

6. Tuan is more intelligent than any students in his class.

Tuan is the most intelligent student in his class.

7. Linh and Thu don't like bananas.

Linh doesn't like bananas and neither does Thu.

8. How about playing soccer?

Let's play soccer.

9. There are more than 20 houses in my village.

My village has more than 20 houses.

10. They run fast.

They are fast runners.

gọi tuổi bố là x, tuổi con là y.

Ta có:3.y-x=4   (1)

mà x+y=64=> y= 64-x

Thay x= 64-y vào (1) ta có:

3y- (64-y)= 4

=> 3y-64+y=4

=> 4y - 64=4

=> 4y= 4+64

=> y= 68:4

=> y= 17

=> tuổi bố là: 64-17= 47. ( tuổi)

Vậy tuổi con là 17 tuổi

lên mạng tham khảo mấy giáo án trên violet, hoặc lên ucan mà tìm ='=

1. the exam was easier than we though

-> the exam was not as difficult as we though

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Viết lại câu có nghĩa tương đương

1. Be sure to come back home before 9.30!

Remember to come back home before 9.30!

2. This girl is the most hardworking in our class

No one in our class is more hardworking than this girl.