Sage and Tom started the month with the same number of talk minutes on their cell phones. Sage talked for 7 minutes with her dad. Tom talked for 4 minutes with a friend and 3 more minutes with his mom. Do Sage and Tom have the same number of talk minutes left on their cell phone plans? Write an algebraic expression to represent the number of minutes Sage has left.

Write an algebraic expression to represent the number of minutes Tom has left.