Solution: Suppose Xiaoling's family used to have X chickens, then Xiaoling's family used to have 3x ducklings, and Xiaoling's family later had (x+2) chickens and (3x+2) ducklings.
(
x+2)*2=3x+2
The solution is x=2 (only)
Xiaoling's original duckling was 3x=6 (only).
A: Xiaoling's family originally raised two and six ducklings.