Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks. Two students in the same Spanish class, Tim and Haley, plan to get together after school to make vocabulary flashcards. Tim started on the project yesterday and has already made 11 flashcards. Haley hasn't started yet. Since Tim makes 8 flashcards per minute and Haley makes 9 flashcards per minute, Haley will soon have the same number of flashcards. How many flashcards will each student have at that point? How long will that take?