PLEASE HELP!

There are two hotels that want to offer their ouests Internet access. The hotels have different service Plans that charge the users as a function of time, t (in minutes), spent on the computer. The hotels' service plans are represented below, where C represents the cost to use the Internet on that plan:
Plan 1 C=1.00t+5.
Plan 2 C=0.65t+7.
According to the equations shown above, after what amount of time would Plan I cost the same as Plan II?