1. The problem statement, all variables and given/known data 1. Two events occur at the same place in a certain inertial frame and are separated by a time interval of 4 s. What is the spatial separation between these two events in an inertial frame in which the events are separated by a time interval of 6 s? 2. Relevant equations There are two equations here that relate time in different inertial frames: t' = γ (t - vx/c^2) and t= γ (t' + x'/c^2) 3. The attempt at a solution I want to obtain the value of γ from one of these equations but of course, they will give me different answers, how do I know which one to use? Thanks for your time.