https://www.buymeacoffee.com/DrDavidJohnk
Using Lingo to solve a simple Linear Programming problem
Note: at 2:34 in the video I add constraints to keep variables non-negative, in Lingo by default all variables are NONNEGATIVE, so no “x is great or equal than 0” is needed.
Moreover, if any variable x may get a negative value you should declare it by @free(x)
