Linear programming - Problem formulation - Example 4 - Fertilizer mix

In this video, you will learn how to formulate an Linear Programming model for a fertilizer mix problem.

[agusparamasetya]

Hi, for the constraints. should it be: --. 0.2x + 0.4y >= 5; --. 0.2x + 0.4y <=15
As fertilizer must contain atleast 25% bonemetal (which imply must contain maximum 75% bonemetal)
Because: 25%bonemetal + 15%nitrogen + 10%phospate = 50% of total fertilizer.
So that, it means maximum bonemetal in ingredient is: 75% of total fertilizer