document.write( "Question 718810: a new photocopier works 4 times as fast as an old one. when the machines work together, a unicersity can produce all its staff manuals in 12 hr. find the time it would take each machine working alone to complete the job \n" ); document.write( "

Algebra.Com's Answer #441068 by solver91311(24713) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "Let's say that it takes

hours for the new machine to do the job by itself. Then it must take

hours for the old machine by itself. Then we can say that the new machine can do

of the job in one hour, and the old machine can do

of the job in one hour. Since we know that it takes 12 hours for both machines working together, we know that the two machines working together can do

of the job in one hour. All of that leads us to:\r
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\r
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\n" ); document.write( "\n" ); document.write( "Solve for

, then calculate

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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "Egw to Beta kai to Sigma
\n" ); document.write( "My calculator said it, I believe it, that settles it
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$\"The$

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