Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
x+2y-z=2, 2x+ay-z=-3, -x-4y+2z=-3�
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random