Linear Programming Maple 18

Løsning af et lineær programmerings problem med Maple 18. Der vil blive brugt kommandoerne "implicitplot", "Maximize" og "Minimize" for at tegne polygonområdet samt finde største og mindste værdien.

[engineerosmanacar]

Can you tell me what should I do for the use of math segment of Maple. I can only use text segment. when I type variables in working page as the math segment is selected, it does not work. But in math segment if I type adding of two number for example 2+3 it works and shows me the result.