Suppose you're the owner of a smoothie shop and that you have three fruits available to make smoothies: bananas, blueberries, and strawberries. You sell three types of smoothies, and each type requires a different amount of each fruit. See below the ingredient list for each smoothie: Classic: 2 bananas, 3 cups of blueberries, and 1 cup of strawberries Blue: 3 cups of blueberries and 3 cups of strawberries Strawnana: 1 bananas and 2 cups of strawberries At the end of the day you have used the following ingredients: 15 bananas, 30 cups of blueberries and 36 cups of strawberries. To figure out how many smoothies of each type were sold during the day, you set up the linear system