document.write( "Question 1168933: Christy can finish typing one letter ahead of John by 1 min. Together they can finish 27 letters in 60 mins. How long does it take for each to finish typing one letter? \n" ); document.write( "
Algebra.Com's Answer #793579 by josgarithmetic(39617)\"\" \"About 
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Time for john to write 1 letter, j.
\n" ); document.write( "Time for Christy the same leter, j-1.\r
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\n" ); document.write( "\n" ); document.write( "\"%281%2Fj%2B1%2F%28j-1%29%2960=27\" for RT=W, rate multiplied by time is how much work done.\r
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\n" ); document.write( "\n" ); document.write( "---\r
\n" ); document.write( "\n" ); document.write( "\"%281%2Fj%2B1%2F%28j-1%29%29%2A20=9\"\r
\n" ); document.write( "\n" ); document.write( "\"%28j-1%2Bj%2920=9%28j%5E2-j%29\"\r
\n" ); document.write( "\n" ); document.write( "\"20%282j-1%29=9j%5E2-9j\"\r
\n" ); document.write( "\n" ); document.write( "\"40j-20=9j%5E2-9j\"\r
\n" ); document.write( "\n" ); document.write( "\"9j%5E2-49j%2B20=0\"\r
\n" ); document.write( "\n" ); document.write( "\"j=%2849%2B-+sqrt%2849%5E2-4%2A9%2A20%29%29%2F%282%2A9%29\"\r
\n" ); document.write( "\n" ); document.write( "\"j=%2849%2B-+sqrt%281681%29%29%2F%282%2A9%29\"\r
\n" ); document.write( "\n" ); document.write( "\"j=%2849%2B-+41%29%2F%282%2A9%29\"\r
\n" ); document.write( "\n" ); document.write( "-\r
\n" ); document.write( "\n" ); document.write( "\"system%28cross%28j=4%2F9%29%2COR%2Chighlight%28highlight%28j=5%29%29%29\"
\n" ); document.write( "One of these will not work but the other does work.
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