SOLUTION: Good morning everyone, Can you help me? Please. 1) Computer Time: It takes a computer 8 days to print all of the personalized lettersfor a national sweepstakes. A new computer

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Question 126009: Good morning everyone,
Can you help me? Please.
1) Computer Time: It takes a computer 8 days to print all of the personalized lettersfor 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 josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
In words:
(1 job/8 days) + (1 job/5 days) = 1 job/x days
1%2F8+%2B+1%2F5+=+1%2Fx
multiply both sides by 40
5+%2B+8+=+40%2Fx
13x+=+40
x+=+3.077days answer