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.
1/2 x - 2y = 4 and 4y - x = -8
1/2 x - 2y = 4 and 4y - x = -8
Natural Language
Math Input
Extended Keyboard
