At the local grocery store, 6 bananas and 3 oranges cost $10. Also, 3 bananas and 5 oranges cost $12. What is the combined cost of one banana and one orange at the local grocery store? Round to the nearest cent.

Question

At the local grocery store, 6 bananas and 3 oranges cost $10.  Also, 3 bananas and 5 oranges cost $12.  What is the combined cost of one banana and one orange at the local grocery store?  Round to the nearest cent.

Steve · Answer

6b+3o = 10 3b+5o = 12 12b+6o = 20 9b+15o = 36 21b+21o = 56 b+o = 56/21 = 2.67