There are at least 8 artists called "X".
These are photos from concerts where X played, so they may be of other bands that played the concert as well.
X Oct 12, 1985 Upper Darby, Pennsylvania, United States Uploaded by Grace G
X / Del Fuegos Oct 12, 1985 Upper Darby, Pennsylvania, United States Uploaded by Zimtrim
Farm Aid Sep 22, 1985 Champaign, Illinois, United States Uploaded by Len Czyzniejewski