document.write( "Question 211416: Anthony and Donita can complete a project in 21/5 hours. It takes Donita 14 hours to do the same project working alone. How long does it take Anthony to complete the project when he works alone? \n" ); document.write( "
Algebra.Com's Answer #159779 by rapaljer(4671)\"\" \"About 
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Let A = time it takes Anthony to do the job alone
\n" ); document.write( "D= time for Donita to do the job alone = 14 hours
\n" ); document.write( "T= time for Anthony and Donita to do the job together= 21/5 hours
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\n" ); document.write( "\n" ); document.write( "The basic equation is \"1%2FA+%2B+1%2FD+=+1%2FT\"
\n" ); document.write( "\"1%2FA+%2B+1%2F14=1%2F%2821%2F5%29\"
\n" ); document.write( "\"1%2FA+%2B+1%2F14+=+5%2F21\"\r
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\n" ); document.write( "\n" ); document.write( "The LCD for the equation is actually 7*2*3*A = 42A, so multiply both sides of the equation by 42A.\r
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\n" ); document.write( "\n" ); document.write( "\"42A%2A%281%2FA%29%2B+42A%2A%281%2F14%29+=+42A%2A%285%2F21%29+\"\r
\n" ); document.write( "\n" ); document.write( "\"42+%2B+3A+=+10A+\"
\n" ); document.write( "\"42+=+7A+\"
\n" ); document.write( "\"6+=+A\"\r
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\n" ); document.write( "\n" ); document.write( "Anthony will take 6 hours to complete the project alone.\r
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\n" ); document.write( "\n" ); document.write( "R^2\r
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\n" ); document.write( "\n" ); document.write( "Dr. Robert J. Rapalje, Retired
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