Question

At the football game, 4 hamburgers and 5 soft drinks cost $31, and 4 hamburgers and 3 soft drinks cost $25. Which system of equations below can be used to determine the price of a hamburger and the price of a soft drink?

(Let x represent the cost of a hamburger and y represent the cost of a soft drink.)

8x + 8y = 56

4x + 9x = 31
5y + 3y = 25

4x + 5y = 31
4x + 3y = 25

4x + 4y = 31
5x + 3y = 25