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+4y+2z=2; x+y-z=-1; -x+4y+4z=2
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
