At a store, 7 cartons of whole milk cost $10.50 and 5 cartons of fat-free milk cost $5.00.

Question

How much would it cost to buy 3 cartons of whole milk and 2 cartons of fat-free milk?

Answer 1

Divide 10.50 by 7 to find the cost of 1 carton whole milk = 1.50 per carton

Divide 5.00 by 5 to find cost of 1 carton fat free milk = 1.00 per carton

So
3 X 1.50 = $4.50 for whole milk
2X 1.00 = $2.00 for fast free