Solution to the Problem:

A + B + C = 57

From equation 1,
3A = 39, so A = 13.

From equation 2,
2B - 13 = 25, so B = 19.

Substituting in equation 3,
B + C = 44, so C = 25.

Correctly solved by:

1. Kelly Stubblefield Mobile, Alabama
2. Dr. Hanybal Yazigi ----------
3. Brooke German Marshall, Wisconsin
4. James Alarie Flint, Michigan
5. SreeRoopa Sankararaman Singapore, Singapore
6. Rob Miles Northbrook, Illinois
7. Ivy Joseph Pune, Maharashtra, India
8. Brijesh Dave Mumbai City, Maharashtra, India