Solution of a system with a parameter in the solution

[math7]

In fact, there must be at least one or two more equations in your approach. If I am not mistaken, you are solving a system of equations with mesh method in an electronic circuit. There is also the method of nodes, right? When solved by either method, to obtain a numerical result, the number of equations must be equal to the number of unknowns.
And remember that apart from the solve command of the calculator you can also now use the Equation Library application of our friend Han that is available here http://www.hpmuseum.org/forum/thread-772...on+library