# SOLUTION: It takes a computer 8 days to print all of personalized letters for a national sweepstakes. A new computer is purchased that can do the same job in 5 days. How long would it take t

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 Question 348108: It takes a computer 8 days to print all of personalized letters for a national sweepstakes. A new computer is purchased that can do the same job in 5 days. How long would it take to do the job with both computers working on it?Answer by stanbon(60778)   (Show Source): You can put this solution on YOUR website!It takes a computer 8 days to print all of personalized letters for a national sweepstakes. A new computer is purchased that can do the same job in 5 days. How long would it take to do the job with both computers working on it? ---- Older computer rate = 1/8 job/day --- new computer rate = 1/5 job/day ----- Let together rate = 1/x =============================== Equation: rate + rate = together rate 1/8 + 1/5 = 1/x 5x + 8x = 40 13x = 40 x = 40/13 = 3.08 days (time working together) ===================================================== Cheers, Stan H.