Oranges cost $4.25 for 5 and apples cost $4.50 for 6. What would be the total cost of 3 oranges and 2 apples?

Question

My teacher never taught me how to solve this ):

Answer 1

You can set up a proportion like this:

Then you cross multiply to solve for "x", the cost of 3 oranges and "y", the cost of 2 apples.

So, for "x":

4.25(3) = 5x

12.75 = 5x

x = 12.75/5 = $2.55

For "y":

4.50(2) = 6y

9 = 6y

y = 9/6 = $1.50

So the cost of 3 oranges and 2 apples is $2.55 + $1.50 = $4.05