OK thank you.
Changing the equation and rearranging know do. But what I want is a single equation to find any of the missing variables.

I would like to know how to program it.

Hello everybody , I am New with Ti CX CAS and need help.
First , I have a basic equation as: Re = ( ρ * v * d ) / μ .
I find the Re value but I wish I could find any of the variables I already have the case Re .
How could I perform this function ?
Example : Re = ( ρ * v * d ) / μ
Rc = 2; ρ = 1; d = 5, v = μ = 0.5 ?.
How to find the v =

According if someone can give me a place to have a program booklet for the calculator .