Polly and Molly are writing letters to all of the athletes they love most. They have a list of 15 athletes, and Polly has already written 2 letters. Molly has written 4 letters. Write an equation with the variable (L) and show your work to determine how many letters they have left to write.
Together, Polly and Molly have written 6 letters so to find out how many they have left to write we subtract 6 from 15 which will give you your answer (L).
