marios rental store charges a one time fee of $18 and then $6 per movie.Luigi's rental store charges $9 per movie. How many movies must be rented for the total cost of the two stores to be equal
explanation: make the equations equal each other. 18+6m=9m. subtract 6m from both sides leaving you with 18=3m. then divide both sides by 3 (18/3 = 3m/3) and you’re left with 6=m.
