 
 <prompt> ```Lucy nwụrụ anọ nke a na-akpọ onye-nkiri nke ya. O nwere ike ịzụrụ ike nke a, ma ọ bụrụ na ọ nwere ike ịzụrụ ike nke a, ọ dịghị ike nwere $15. Kedu ihe ọ bụla Lucy nwere na ọzọ?``` <response>: ```The $15 is 1 - 1/4 = 3/4 of the money left.
Since 3/4 is equal to $15, then 1/4 is equal to $15/3 = $5.
So Lucy had $5 x 4 = $20 left after losing 1/3 of her money.
Hence, $20 is 1 - 1/3 = 2/3 of the money that Lucy had at the beginning.
Since 2/3 is equal to $20, then 1/3 is equal to $20/2 = $10.
Therefore, Lucy had $10 x 3 = $30 at the beginning.

The final answer: 30.``` 