Solve and graph basic algebraic equation

I have an algebraic equation with a number of unknowns and constants.
I need to have the equation re-arranged, solving for the output unknowns, using Excel.

Then, in Excel, assuming values for the input unknowns, I need to have a series of graphs to visualise the outcomes.

The algebra involved is no more than A-level maths standard but I am looking for a maths or engineering degree student or graduate to ensure I get the right answer.