Question

​3 ​/​10 ​​ = ​9 /​k ​​ what is k

Answer 1

The answer is that K= 30.

Answer 2

In order to isolate k, we would first cross multiply
3*k=9*10
3k=90

Then to isolate k, we would divide both sides by 3 to get:
K=30

Hope this helps