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.
solve (3((3((3n+1)/a)+1)/b) + 1)/c = 3/a * 3/b * 3/c * r for r
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random