There are 50 students going on the band field trip. They are planning on using two methods of traveling. They will use cars that can hold 5 students each and
vans that can hold 7 students each. Let x represent the number of cars used and
let y represent the number of vans used. Which of the following equations
would be used to represent the situation?
a. x + y = 50
b. 5y = 7x + 50
C. 5x – 7y = 50
d. 5x + 7y = 50