I am having trouble finding a numeric solution to this equation: solve(P*(.001+(2.54e-4)*(2/1000*P)^(1/2)*t)^(7/5)=43.5,P); It works when t:0; but when I plug in different values for t, it does not seem to be able to find a solution. Is there some kind of numeric method (like Newton's method) that can solve this? Regards, Chris Maness