Chromebook download for Qemu

[An Le]

Hello, I am a chromebook user and  was looking to install Qemu using the command "sudo apt-get install git libglib2.0-dev libfdt-dev libpixman-1-dev zlib1g-dev ninja-build" and "apt-get install qemu-system" but they do not work at all and does not show the application up. What is the proper way of downloading Qemu or What are the linux commands for downloading Qemu?