Ms. Pacheco, Mr. Edwards, and Mr. Richards are three math teachers at Turner Middle School. Ms. Pacheco is three years older than Mr. Richards. Mr. Edwards is twice as old as Mr. Richards. The sum of Mr. Richards' age and Mr. Edwards' age is 81. How old is each person?

First you subtract 3 years from the sum of Mr. Richards' and Mr. Edwards' age because Ms. Richards is 3 years older than Mr. Richards. Then divide 78 by 3 because 2/3's of the years will go to Mr. Edwards and 1/3 of the years to Mr. Richards since he is double the age of Mr. Richards. So 78:3=26 that gives you 26 and the remaining years are 52. Therefore, Ms. Pacheco is 29, Mr. Richards is 26 and Mr. Edwards is 52