2/5 of Amy's money was 3/4 of Ben's money. When Ben have Amy $28, both of them would have the same amount of money. How much did Amy have at first?
+592 Assuming you mean when Ben takes 28 from Amy they have the same amount of money:
2a/5=3b/4
8a=15b
b+28=A-28
a=b+56
a=15b/8
15b/8=b+56
15b=8b+448
7b=448
b=64
64+56=$\boxed{\$120}$
