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.
(( X*2/3) + 20) *1/2 = X*2/3+3
(( X*2/3) + 20) *1/2 = X*2/3+3
Natural Language
Math Input
Extended Keyboard