"On the outbound leg of K miles, young John walked at a brisk pace. On the way back, young John had to run and so doubled his pace. The entire trip took M hours. Express his rate on the outbound leg in terms of K and M."

Here are the pretty obvious equations I derived from that..

RoTo = K, RbTb = K, RbTb = RoTo, Rb = 2Ro, Tb + To = M

Alright, if anyone can please show me how to work this out, I'd seriously appreciate it. Thanks.