You want to make a tropical smoothie using bananas, oranges, and papayas. You don't
know how many of each to put in the
smoothie, but you know that there are seven
pieces of fruit in the mix. There are twice as
many oranges as bananas. You also know
that the seven pieces of fruit cost $5.25,
where bananas cost S.50 each, oranges cost
5.75 each and papayas cost $125 each.
How many of each fruit will you use for the
smoothie?