Problema Solution

On Monday Joe bought 10 cups pf coffee and 5 doughnuts for his office at the cost of $16.50. It turns out that the doughnuts were more popular than the coffee. On Tuesday he bought 5 cups of coffee and 10 doughnuts for a total of $14.25. How much was each cup of coffee?

Answer provided by our tutors

Let

x = the cost per cup of coffee

y = the cost per doughnut

10x + 5y = 16.50

5x + 10y = 14.25

........

click here to see the system of equations solved for x and y

........

x = $1.25

y = $0.80

The cost per cup of coffee was $1.25.