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.
b +a/e = h, 4h = 20, 2*e + a = 36, b^2 + b = 21
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random