document.write( "Question 976111: A group of 3 workers need 20 days to do a certain job. How long would it take a group of 4 workers to do the same job, if each worker performs at the same rate? \n" ); document.write( "
Algebra.Com's Answer #597774 by josgarithmetic(39620)\"\" \"About 
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RT=J to relate rate, time, job.\r
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\n" ); document.write( "\n" ); document.write( "r, rate for one worker\r
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\n" ); document.write( "\n" ); document.write( "Let t be the time for the group of four workers to do the same job.\r
\n" ); document.write( "\n" ); document.write( "\"system%283r%2A20=1%2C4r%2At=1%29\"
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