20(21-x)=55-75

20(21-x)=(-20)   

     21-x=(-20):20

     21-x=-1

          x=21-(-1)

          x=22

1.ride       2.cooks       3.talks       4.likes listening          5.go

B

B

2.Have you ever been to California?

3.Have you ever run a marathon ?

4.Have you ever spoken to the famous person ?

5.What's the most beautiful place have you ever visited ?

Vật thứ 2 chuyển động nhanh hơn

=8888 x (85+10+6-1)

=8888 x 100

=888800

1.r  2.t  3.a  4.a  5.d  6.f  7.s  10.p

D. File ->New

1.You shouldn't copy friends' work.

2.How often do you go to the gym ?

3.You should prepare well for the exam.

4.Nam is the tallest people in my class.

5.No one in my class is better at Maths than Hoa.