SOLUTION: Fran can write a computer program in 9 days. if Doug helps her, they can write the program in 6 days. How long would it take Doug to write the problem by himself.
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Question 602571: Fran can write a computer program in 9 days. if Doug helps her, they can write the program in 6 days. How long would it take Doug to write the problem by himself.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
1/9+1/x = 1/6
6x+54 = 9x
54 = 9x-6x
54 = 3x
54/3 = x
18 = x
x = 18
So it will take Doug 18 days to write the program by himself.
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