document.write( "Question 1154934: A new printing machine can do a job in 6 hours. An old machine can complete the same job in 16 hours. If 3 new machines and 4 old machines are used to do the job, how many hours will be required to finish? \n" ); document.write( "

Algebra.Com's Answer #777446 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "The new machine makes    of the job per hour.\r\n" );
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document.write( "The old machine makes    of the job per hour.\r\n" );
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document.write( "3 new machines and 4 old machines do   +   of the job per hour.\r\n" );
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document.write( "     +  =  +  =  of the job per hour.\r\n" );
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document.write( "Hence, it will take   hours to complete the job,  or   hours = 1 hour and 20 minutes.   ANSWER\r\n" );
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