A postal service offers flat-rate shipping for mail in special boxes. Today, Ahmed shipped 1 small box and 6 medium boxes, which cost him 360 dirhams to ship. Meanwhile, Sarah shipped 3 small boxes and 6 medium boxes, and paid 420 dirhams. a) Write a system of equations that represents Ahmed and Sara’s purchases.
b) Use the elimination method to show the cost of the small box and the cost of the medium box. someone help pls