document.write( "Question 936709: Two street sweepers can clean the streets of a town in 6h. By himself, the newer sweeper cleaned the street in 10.5h. How much time would the older sweeper require to clean the streets working alone? \n" ); document.write( "
Algebra.Com's Answer #570208 by TimothyLamb(4379)\"\" \"About 
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r = w/t
\n" ); document.write( "x = time of older sweeper
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\n" ); document.write( "rates are additive:
\n" ); document.write( "1/10.5 + 1/x = 1/6
\n" ); document.write( "1/x = 1/6 - 1/10.5
\n" ); document.write( "x = 1/(1/6 - 1/10.5)
\n" ); document.write( "x = 14
\n" ); document.write( "---
\n" ); document.write( "answer:
\n" ); document.write( "14 hours
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