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.
10G + 10C = 9, 9G + C = 1.8, G=9H, R=G+H
10G + 10C = 9, 9G + C = 1.8, G=9H, R=G+H
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
