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How to do the math problems in the sixth grade of this primary school? Explain! No explanation, no adoption!
First, calculate the proportion of projects completed by Party A and Party B in one day:

Answer: 201; B: 25 years 1.

A did it alone for 6 days: 6 in 20, 6 in 20 14.

65438 within 20+04/25 1= 17.5 days.

The answer is 17.5 days.

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