Tìm x biết a, 2/3×5/7-x=1/6 b, 4/11÷15/21+x=19/5

2 bình luận về “Tìm x biết a, 2/3×5/7-x=1/6 b, 4/11÷15/21+x=19/5”

1. a. 2/3xx5/7-x=1/6

   10/21-x=1/6

   x=10/21-1/6

   x= 13/42

   Vậy x=13/42

   b) 4/11:15/21+x=19/5

   4/11xx21/15+x=19/5

   28/55+x=19/5

   x=19/5-28/55

   x=181/55

   Vậy x=181/55

   Trả lời
2. a, 2/3×5/7-x=1/6

   10/21-x=1/6

   x=10/21-1/6

   x=13/42

   Vậy x=13/42

   b, 4/11:15/21+x=19/5

   28/ 55+x=19/5

   x=19/5-28/55

   x=181/ 55

   Vậy x=181/ 55

    

   Trả lời