Question

7/5-a/4=13/20

 

Answer 1

a/4=7/5-13/20

a/4=(tự tính)

Answer 2

7/5 - a/4 = 13/ 20

        a/4 = 7/5 - 13/20

        a/4 =     3/4

3/4 bạn nhé !!! 

Answer 3

7/5 - a/4 = 13/20

        a/4 = 7/5 - 13/20

         a/4 =    3/4

3/4 bạn nhé !!!!

Answer 4

7/5-a/4=13/20

      a/4=7/5-13/20

      a/4=3/4

suy ra a=3