HELP: Need a jump start equation back solver

[trojdor]

I would personally just use the solver app. (the big orange Solve button on the Apps screen....NOT the linear solver next to it)
Save the programming for something complicated/unusual.

I think the numeric solver will do everything you need w/out writing any code.
Enter the equation pretty much as you've written it (in Symbolic view).
Make sure you've got a check mark next to the equation you want to solve, and switch to numeric view. (the button under Plot).
Enter the know variables....solve for the remaining unknown.
Done.