what are you doing?

Mr.Tam (be)1 ....... a teacher . Two years ago , he (teach)2......math at a secondary school in the country .But now he (teach)3.........at a high school in the city.

giup minh nha . I love cam on ban

Ta có  :\(\frac{2}{x}=\frac{5}{6}\)=> 5x = 12

=> x = 12/5 nha!

                              Gọi số bạn trong nhóm là A

 Số kẹo là : 5*A-3

                   4*A+2

  5*A-3 =4*A+2

      A=3+2

      A=5