How Many Kilograms of Bananas Did the Zookeeper Buy?

Thread starter Paulo2014
Start date Mar 30, 2008

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SUMMARY

The zookeeper's problem involves purchasing bananas and nuts, totaling $133.10, with bananas costing $2.20 per kilogram and nuts costing $4.80 per kilogram. The zookeeper buys 8 kilograms more bananas than nuts, leading to the equations B + N = 133.10 and B = N + 8. By substituting the second equation into the first, the correct solution reveals that the zookeeper bought 28.43 kilograms of bananas and 20.43 kilograms of nuts.

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Apr 1, 2008

HallsofIvy

Science Advisor

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Um what? Have you solved the two equations B= N+ 8 and 2.20B+ 4.80N= 133.10?
Since B= N+8, replace the B in the second equation with that: 2.20(N+ 8)+ 4.80N= 133.10. Now solve that equation for N.