<PRE><B>Question 1004262</B>
You can approach this logically without any
algebra at all
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1/4 as many elves would take 4 times as long 
to do the same job, so
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2 elves can pack 12 boxes in 2 hrs
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The same number of elves will takes twice
as long to pack twice as many boxes, so
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2 elves can pack 24 boxes in 4 hrs
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3 times as many elves can do the same job in
1/3 of the time, so
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6 elves can pack 24 boxes in 4/3 hour which is
1 hour and 20 minutes</PRE>