A delivery truck is transporting boxes of two sizes:

Question

The combined weight of a large box and a small box is 70

 pounds. The truck is transporting 50

 large boxes and 65

 small boxes. If the truck is carrying a total of 3950

 pounds in boxes, how much does each type of box weigh? 

Answer 1

65x + 50(70-x) = 3950

65x -50x = 3950 -3500

15x = 450

x = 30 lbs is the weight of the small box

70-x = 40 lbs is the weight of the large box