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.
(333 %2B 4.2*18 %2B 1.8*15)x%3D3.8*1.08(100-18)(3.5-x)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random