title: How to get the solution of a linear programming equations
body: <p>A farmer has a piece of farm land, say L km2, to be planted with either wheat or barley or some combination of the two. The farmer has a limited amount of fertilizer, F kilograms, and insecticide, P kilograms. Every square kilometer of wheat requires F1 kilograms of fertilizer, and P1 kilograms of insecticide, while every square kilometer of barley requires F2 kilograms of fertilizer, and P2 kilograms of insecticide. Let S1 be the selling price of wheat per square kilometer, and S2 be the selling price of barley. If we denote the area of land planted with wheat and barley by x1 and x2 respectively, then profit can be maximized by choosing optimal values for x1 and x2. This problem can be expressed with the following linear programming problem in the standard form:
  see this page where they have given the constraints.
  <a href="http://en.wikipedia.org/wiki/Linear_programming" rel="nofollow">http://en.wikipedia.org/wiki/Linear_programming</a></p>
  
  <p>What is the procedure to solve such kind of questions ?</p>