Question

Tìm x biết :

a) x + 3/4 = 7/4

b) 4/5 + 5/6 : x = 1/6

Answer 1

a) x+3/4=7/4

        x=7/4-3/4

        x=4/4=1

b) 4/5+5/6:x=1/6

          5/6:x=1/6-4/5

          5/6:x=-19/30

               x=-19/30.5/6=-19/25

Answer 2

a) x + 3/4 = 7/4

   x          = 7/4 - 3/4

   x          =   4/4 = 1

vậy: x=1

b) 4/5 + 5/6 : x = 1/6

            5/6 : x = 1/6 - 4/5

            5/6 : x =    -19/ 30

                   x = 5/6 : (-19/30)

                   x = -25/19

 vậy: x= -25/19