Question 939879
Original Question: Bill is ten years older than his sister. If bill was twenty-five years of age in 1983; in what year could he have been born?
.
.
First off you need to look at the problem and see the important data. The fact that he is ten years older than his sister is in there just to throw you off. If he was 25 years of age in 1983 you simply take the year and subtract 25 from the year.
.
.

 1983
-  25
_____
 1958
.
.

I hope this helped. Good luck and God Bless.