Two glasses of milk and 4 snack bars have a total of 66 carbohydrates (carbs), and 4 glasses of milk and 3 snack bars have a total of 82 carbs. Determine how many carbs are in one glass of milk and in one snack bar

2m + 4s = 66.

4m + 3s = 84.

(Double the 2 glass of milk and 4 snack bars)

4m + 8s = 132.

4m + 3s = 84.

(Take away the second equation from the first equation)

5s = 48.

s = 48/5.

s = 9.6.

4m + 3 (9.6) = 84.

4m + 28.8 = 84.

4m = 84 - 28.8.

4m = 55.2.

4m/4 = 55.2/4.

m = 13.8.

In a glass of milk, there are 13.8 carbs, and in a snack bar, there are 9.6 carbs.

2 (13.8) + 4 (9.6) = 66.