document.write( "Question 838343: Suppose one person can mow a lawn in x hours and a second person can mow the same lawn in y hours. How long will it take the two people to mow the lawn if they work together? \n" ); document.write( "
Algebra.Com's Answer #505007 by richwmiller(17219)\"\" \"About 
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1/x+1/y=1/z
\n" ); document.write( "where z is number of the hours needed working together
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