math
posted by Amy on .
Video rental Store A charges a membership fee of $25 and $2 for each movie rental.
Video rental store b charges a membership fee of $10 and $2.50 for each movie. Find the number of movies rentals for which both stores' charges are the same

Ok how bout if you equate the number of movies each store sold as x and then multiply it by how much it costs to rent a movie at each store. Set up two equations with the member fee included into the equation,one for Store A (use y to represent the total cost)
25 + 2x = y
then do the same for the other eaution
10 + 2.5x = y
no equate them together
25 + 2x = 10 + 2.5x
now all you have to do is solve for x and that will tell you how many movies were sold.