Finding the Number of Pasta Dishes Ordered

A restaurant has two special menu items: pasta and salad. The cost of a pasta dish is $12, and the cost of a salad is $8. During a special promotion, customers can order a combination of these dishes at a discount. If a customer orders a total of 5 dishes, consisting of both pasta and salad, and the total cost after a 10% discount is $48, how many pasta dishes did the customer order?