1 What is your hobby?

2 When did you start your hobby

3 Why do you enjoy your hobby

4 How many hours a day do you spend on your hobby

5 What does Jim usually do in his free time

6 How often does he play volleyball 

7 Where does he often play volleyball

8 Who does he like to play volleyball with

I. Write questions for the underlined parts.

1. A: What is your hobby

B: My hobby is photography.

2. A:When did you started yor hobby

B: I started my hobby five years ago.

3. A:why do you enjoy your hobby

B: I enjoy my hobby because I think it’s creative.

4. A:How many hours a day fo you spend on your hobby

B: I spend two hours a day on my hobby.

5. A:What does Jim ussually do in his free time

B: Jim usually plays volleyball in his free time.

6. A:How often does he play volleyball  

B: He plays volleyball three times a week.

7. A:Where does he often play volleyball 

B: He often plays volleyball at the court near his school.

8. A:Who does he like to play with

B: He likes to play volleyball with his friends.                                                

Chán mớ!

a-b=2a+2b=a:b

a-b=2a+2b

3a=b.

a:b=-3

2.(a+b)=3

a+b=1,5

Có tổng và hiệu của a với b rồi,tự làm nhé!

b tương tự,biến đổi khó hơn,chịu khs=ó nghĩ như câu a nhé!

Chán mớ!

Chúc em học tốt^^

a)a-b=2(a+b)

a-b=2a+2b

=>-b-2b=2a-a

-3b=a

=>a:b=-3

Như vậy a-b=-3

Thay a=-3b vào đẳng thức trên, ta có

-3b-b=-3

-4b=-3

=>b=3/4

a=3/4.(-3)=-9/4

b) ab=a:b  =>b=1 hoặc b=-1

Với b=1 thì a+1=a ( loại)

Với b=-1 thì a-1=-a

=>a+a=1

2a=1

a=1/2

Vaayja=1/2 , b=-1

a)a-b=2(a+b)=2a+2b => a=2a+3b => -a=3b => b=-a/3

mà a-b=a:b => a-(-a/3)=a:(-a/3) => 4a/3=-3 => a=-9/4 => b=3/4

b)a+b=ab => a=ab-b=a(b-1) thay vào a:b=a:a(b-1)=b-1

mà a+b=b-1 => a+b=b+(-1) => a=-1 thay vào a+b=ab ta được:  (-1)+b=(-1).b

=>b-1=-b=>2b=1=>b=1/2

=1/2 nhớ k

=1/2.

Tk cho mình nha ae!!!!!!!!!!