SOLUTION: Nancy has 2 printers available to her. Together, the 2 printers can print a document in 9 min. The Epson Stylus 850 can print the document in 12 minutes working by itself. How long

Question 400957: Nancy has 2 printers available to her. Together, the 2 printers can print a document in 9 min. The Epson Stylus 850 can print the document in 12 minutes working by itself. How long would it take her EPson Stylus 500 to print the document working by itself?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Nancy has 2 printers available to her. Together, the 2 printers can print a document in 9 min. The Epson Stylus 850 can print the document in 12 minutes working by itself. How long would it take her EPson Stylus 500 to print the document working by itself?
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Together rate: 1/9 job/min
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E850 rate: 1/12 job/min
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E500 rate: 1/x job/min
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Equation:
rate + rate = together rate
1/12 + 1/x = 1/9
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Multiply thru by 36x to get:
3x + 36 = 4x
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x = 36 min (time required for the E500 to do the job alone)
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Cheers,
Stan H.

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