So movie club one:
Cost = 100+10n, where n is the number of movies
Club 2:
Cost = 15n
So when they are equal:
100 + 10n = 15n 100 = 5n n = 100/5 **** n = 20
You would need to buy 20 movies for the total cost to be the same for both movie clubs. This is found by setting up equations for the costs and solving for the number of movies. After solving, we find n = 20 .
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