Hi, my name is Patrick. I am fifteen and just started playing a few months ago. I have many ?'s. One: What do the symbols like x and lets say 3/5 mean.

How Would I Play This:

+--------------------------------------------------------------------
+--------------------------------------------------------------------
+--------------------------------------------------------------------
+---4..4----4-----4..4----4-----4..4----4-----4..4----4--------------
+-0-2..2--X-2---0-2..2--X-2---0-2..2--X-2---0-2..2--X-2--------------
+--------------------------------------------------------------------

oh it's from Ac Dc's Long way To the top.
Any help would be appreciated.