Madelyn and Camden are both driving along the same highway in two different cars to a stadium in a distant city. At noon, Madelyn is 391 miles away from the stadium, and Camden is 371 miles away from the stadium. Madelyn is driving along the highway at a speed of 51 miles per hour, and Camden is driving at a speed of 47 miles per hour. Let M(t) represent Madelyn's distance, in miles, away from the stadium t hours after noon. Let C(t) represent Camden's distance, in miles, away from the stadium t hours after noon. Write an equation for each situation, in terms of t, and determine how far both Madelyn and Camden are from the stadium at the moment they are an equal distance from the stadium.