Since the unknown is the number of movies, we will assign it a variable, namely x. Since we cannot exceed 15 GB, this tells us the problem will involve an inequality. If each movie uses 0.75 GB, we can set up the following inequality:
0.75x + 3 ≤ 15
We add three because that is the amount of data already used. Now, solve this inequality for x to determine the maximum number of movies you may watch before exceeding the monthly limit on the cellular plan.
