Question

If x varies inversaly as y and x=9 when y=21,find x when y=7

Answer 1

Heya ☺

Given that

x and y vary inversely

It is a case of inverse variation.

x/y = 9/21 = x/7

9 × 21 = 7x

=> x = 9 × 21/7

=> x = 27


Thanks