A grocery store sells bananas for b dollars a pound and grapes for g dollars a pound. Priya buys 2.2 pounds of bananas and 3.6 pounds of grapes for $9.35. Andre buys 1.6 pounds of bananas and 1.2 pounds of grapes for $3.68. This situation is represented by the system of equations: 2.2b + 3.69 = 9.35 1.6b + 1.29 = 3.68 Explain why it makes sense in this situation that the solution of this system is also a solution to 3.86 + 4.89 = 13.03.​