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.
solve a1+2*a2+3*a3=7, 3*a1+8*a2+a3=9, 4*a1+5*a2+9*a3=16
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random