Bananas cost 1.50 per pound, and guavas cost 3.00 per pound. Kiran spends 12 on fruit for a breakfast his family is hosting. He buys b pounds of bananas and pounds of guavas. Here is your equation from Problem 4.1: 1.50b+3g=12 If he buys 4 pounds of bananas, how many pounds of guavas can he buy?