1. what time does your class start?

2. how long does hoa work a week?

3. why does hoa definitely not lazy?

x+1985 = 25365

x = 25365 - 1985

x = 23380

x - 125 = 2569

x = 2569 + 125

x = 2694

Quy đồng mẫu các phân số:

5 2 2 . 3 ;   7 2 3 . 11