6. Three workers in a bookbinding workshop packed a batch of books and sent them to the post office (each bag is required to contain the same number of books). For the first time, they brought seven-twelfth of the books, and as a result, they packed 14 packages, more than 35 books. The second time, they brought all the rest of the books, plus the extra part from the first time, which just filled 1 1. How many books are there in this batch?

1/( 1 1+ 14)= 1/25

35 (7/12-1/25x14) =1500 (Ben)

8 A project takes Party A 10 days, and Party B completes it in 30 days. Now two people cooperate, during which Party A takes two days off and Party B takes eight days off (two people take the same day off). So, how many days did it take from the beginning to the completion of task one?

( 1+ 1/ 10 x2+ 1/30 x8)÷( 1/ 10+ 1/30)= 165438+

A truck and a bus go from A to B at the same time. When the freight car is 270KM away from B, the bus has already traveled to the midpoint of the whole journey. At this speed, when the bus arrives at point B, the truck has already traveled eight tenths of the whole journey. What is the distance between a and b?

Speed ratio: truck: bus = 8/9: 1 = 8: 9.

270 ÷ (1-1/2 ÷ 9x8) = 486 (km)