This question already has an answer here:
When I try to install Steam 64bit I get this error:
Package dependencies cannot be resolved This error could be caused by required additional software packages which are missing or not installable. Furthermore there could be a conflict between software packages which are not allowed to be installed at the same time. The following packages have unmet dependencies: steam64: Depends: steam (= 184.108.40.206ubuntu1) but it is a virtual package
Any idea on what to do? I've searched this website and tried most of the answers but none of it worked.