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+y-2z=7 and 2x-y+z=0 and x+y-z=6
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
