Giúp mình với ạ Cần gấp ạ

Giúp mình với ạ

Bt1 

A,  x.3+5.x = 256

B,  42.x-37.x = 205

C,  34.x-29.x = 155

Giúp mik vs ạ

Cần gấp 

Giúp mik vs ạ Cần gấp

Giúp mik vs

Tìm và sửa lỗi sai

1.When he came , we studied EL

2.Her parents are working on the farm when we arrived

3.He buys a new car when he has enough money

4.At this time last night , I practiced speaking EL

5.Last night , she was listening to music

6.I have saw him for a long time

7.How long did you meet him ?

8.This is the first time I read the novel

9.It's 6 months since I have met him

10.He went swimming once a day