how uncompress 7z file

edit

when run yum install p7zip give me this err :

Loaded plugins: langpacks
Repository fedora-yum-fast-downloader is listed more than once in the configuration
Repository fedora-yum-fast-downloader-source is listed more than once in the configuration
No package p7zip available.
Error: Nothing to do

Hmm, that's odd. The file is listed here:

http://rpmfind.net/linux/rpm2html/search.php?query=p7zip

You can download a suitable RPM for your system from there if necessary.

when i want to install package 7zip with terminal give me some err for dependency ! but when i click on package ! software manager run ! and when i press button install after some minute 7zip installed and i can uncompress .7z file ! but why terminal need Dependency ?! and software updater don't say something that ?!

Have you Installed RPMFusion, free and non-free repository

yum -y localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpmhttp://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm

I had none problem to install 7zip using terminal, but then looks like it isn't there. right click on a .rar file and no 7zip nowhere. Do I have to reboot fedora?