Yes a lot of people already know this, but not everyone does.
Got a game that won't read but you really want to play it? Ok this may take a while and it does cost... (but not a lot) go to your local rental shop and rent the game that your disc at home won't read. Once you've got it install the game to your HDD. Usually after it's installed you can put the disc (one that doesn't read) in and it'll boot the game up. Then you can play that game off your HDD anytime you want with your broken disc.

how do i take apart my xbox 360 made in 2010? i just want to get to my tray it keeps reading open tray its not reading my disc

or just keep the game that u got from the rental and give them the scratched one! haha