rip the cds to an audio format on your computer (.mp3, .wav, etcetera..)
put the files on your device in your music folder.
play the songs through the android audio player with a cable connected to your phone and your stereo systems aux input (or other such input port).
though... if you already have the files on you computer you could also just hook the stereo up to it directly and play through there. you could play your entire collection then as space is a bit limited on a phone.