Participation in fitness activities for the Millennials (born 1977-1998) and the Gen-Xers (born 1965–1976) has continued to grow in recent years. In 2012, the number of Millennials participating in fitness activities was 11 million more than Gen-Xers. If the total number of Millennials and Gen-Xers participating in fitness activities in 2012 was 93 million, find the number of participants in each age group.
