What is p = 3qr solved for q?

a) 3rp = q
b) p/3r = q
c) 3r/p = q
d) p/3q = r

Your answer is b. the reason being is that you want to isolate q, to do that you have to divide out the 3r from the q. What you do to one side you also have to do to the other so you divide P by 3r. In the end you get. P/3r= q