Answer:
Ann's age is 40
Explanation:
Let A represent Ann
Let M represent Marcy
Let E represent Ellen
- - - - - - - - - - - - - - - - - - - - - - - - - -
Ann: m + 3
Marcy: E + 6
Ellen: 31
Marcy = 31 + 6 = 37
Marcy is 37 years old!
Ann is 3 years older than Marcy
37 + 3 = 40
Ann is 40 years old!