I just started biking last fall and haven't learned much about bikes so please be patient with me. I recently got a tune up on my bike and the next day went to ride it and my chain came loose. Normally I would have gone right back to the bike store to have it fixed but I'm in the midst of finals and haven't had the time, so a couple of weeks have passed. I can post a picture if that would be helpful.
I really have like no money so if someone could help me fix it I would be grateful. I have a Fuji Cambridge VI so it looks like this: 5Lb5K65F83La3Md3Nec3obe1c49be97991ffa.jpg