Question

Three apples cost as much as 4 pears. Three pears cost as much as 2 oranges. How many apples cost as much as 72 oranges ?

Answer 1

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

Answer 2

81 apple....
here is what you do:

Answer 3

cost of 1 apple=x
cost of 1 pear=y
cost of 1 orange=z

Answer 4

3 apples = 4 pears (cost ): 3x=4y
3pears = 2 oranges : 3y=2z

Answer 5

now:
one pear y =3/4 x (from the first equation
substitute in second:
3y=9/4 x =2z
you need 72 oranges - multiply both side by 36:
72z=81x

Good?

Answer 6

I still don't understand the last part everything else is making sence just the last part is confusing.