Mua mỗi quyển vở hết số tiền là :

37 500 : 3 = 12 500 ( đồng )

Mua 5 quyển vở như thế cần trả số tiền là :

12 500 x 5 = 60 000 ( đồng )

Đáp số : 60 000 đồng 

39,2 : y = 4

y = 39,2 :4

y = 9,8

a = 5,7

Em trl ạ

1. I take a lot of walks. Every morning, I go for a ten- to five-minute stroll.
2. I used to go a lot when I was a kid because I used to find  dull and slow, so I was familiar with its effects.
3. Yes, I believe so, because there are a lot of elderly people who wish to lose weight...

  x  

b)  x