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.
3·x - 2·y + 3·z + t = -11,2·x + y + z - 4·t = -18,4·x + 8·y + 4·z + 4·t = 8,x + y + z + t = 4
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random