Answered

(2/5)/x=(3/7)/(9/10)

Sagot :

(2/5)x = (3/7)
             (9/10)

(2/5)x = (3/7) (10/9)    Multiply 3/7 by the reciprocal of (9/10)

(2/5)x = 10/21

(5/2) (2/5) x = (10/21) (5/2)

x = 25/21

To check:

(2/5) (21/5) = (3/7) / (9/10)
10/21 = (3/7) ( 10/9)
10/21 = 10/21