How much does a liter of milk cost and how much does a loaf of bread cost?

Question

Bhavik bought 3 liters of milk and 5 loaves of bread for a total of $11. A month later, he bought 4 liters of milk and 4 loaves of bread at the same prices, for a total of $10. 

 

How much does a liter of milk cost and how much does a loaf of bread cost?

Answer 1

assume M and B the unit price for milk and bread.

3M + 5B = 11

4M + 4B = 10

==>

12M + 20B = 44

12M + 12B = 30

==>

8B=14, B=1.75

M = (10-4*1.75)/4 = 0.75

unit price for milk and bread is $0.75 and $1.75