This is similar to Problem 10 from your Section 3.2 worksheet.

Tony the Ice Cream Maker is making multiple catches of two different flavors of ice cream today. The vanilla ice cream uses $5$ pounds of sugar and $10$ gallons of milk per batch. The chocolate ice cream uses $3$ pounds of sugar and $4$ gallons of milk per batch. At the end of the day, Tony had used a total of $147$ pounds of sugar and $256$ gallons of milk to make the two types of ice cream. How many batches of each type of ice cream did Tony make?

Tony made batches of vanilla ice cream and batches of chocolate ice cream.