Units. Units. Units. Units. and one more time units. I need the units of n to come out, and come out correctly. If excel can do that, that's news to me (although, admittedly, I'm not as well versed in excel as I should be, nonetheless if it can automatically convert decimeters to meters and the like-- I'd be mildly impressed.). This isn't just solving the equation mathematically, this is dimensional analysis nightmare too. I need a CAS that can do both - the only ones that I know of that can do that are W|A and Mathematica. Given that I don't have any training (or a software license) for Mathematica, I'm here, now with a tertiary puzzle on top of it all of how in gods name to wheedle this into a form W|A can properly swallow. Is there some form of extended interface I can use to input this kind of thing? All I need are these 3 things: "input equation" and "define variables WITH UNITS", and "solve for which variable?"
How do I do that?
Please and thank you!
(clarification: originally I was using n instead of x, but made the switch to x in an attempt to make it easier on W|A -- if I've referenced solving for n or x, the meaning is meant to be interchangeable: x=n.)