What linear system of equations does the matrix represent?

Can someone me and plz do the problem

Afarmer has decided to divide his land area in half in order to plant soy and corn. calculate the area of the entire area so he knows how much soil is needed. each bag of soil covers 20 square yards. how many bags should the farmer purchase? (4 points) 1 bag 2 bags 3 bags 4 bags

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?