Question

It is given that x varies inversely with y and x= 9 when y = 21. Find the value of x when y = 7​

Answer 1

Answer:

When Y = 7, the value of X = 27

Step-by-step explanation:

Its given that X varies inversely with Y

This means

$X \alpha \frac{1}{Y}$

XY = K ----------------------EQN 1

When X = 9 then Y = 21

Therefore K = XY = 9 x 21

ie K = 189

When Y = 7 Then EQN 1 becomes

X x 7 = 189

X = 189/7

X = 27

ie.  when Y = 7, the value of X = 27

Answer 2

x= 27 when y=7 this is the answer