2p = x + y

(t - y) + y = p + y

Having trouble with this equation, I need to get it in terms of: t + x + p

and lowest possible values.

I thought with n variables, you needed n equations. This has 4 variables, but only 3 equations.

I gather the idea is to eliminate one variable and get three equations with three variables. I could probably solve it from there, but I keep going in circles trying trying to create new equations.

thanks