Problema Solution
The cafeteria sells 7 cartons of juice for every 8 cartons of milk that it sells for breakfast.If 195 students buy breakfast at the cafeteria, how many cartons of milk would the cafeteria sell?
Answer provided by our tutors
Let
x = the number of cartons of juices sold
y = the number of cartons of milk sold
Assuming that each student buys either juice or milk we have:
x : y = 7 : 8 cross-multiply
8x = 7y
x + y = 195
We have the following system of equations:
8x = 7y
x + y = 195
........
click here to see the system of equations solved for x and y
........
x = 91 cartons of juice
y = 104 cartons of milk
The cafeteria would sell 104 cartons of milk.