document.write( "Question 857511: a printing shop starts a job at 10 a.m. on press A. Using this press alone, it would take 10 hours to complete the job. At 2 p.m. press B is also turned on, and both presses together finish the job at 5 p.m. How long would it take press B to do the job alone? \n" ); document.write( "
Algebra.Com's Answer #516854 by richwmiller(17219)\"\" \"About 
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\n" ); document.write( "10 hours
\n" ); document.write( "7/10+3/x=1
\n" ); document.write( "x=10
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