1, Party A and Party B deposit 8500 yuan. If Party A increases by 25% and Party B increases by one ninth, their money will be the same. How much do Party A and Party B have?

2. Two people read the same book. A read 9 pages on the first day, then read 3 pages more than the day before, and read only 30 pages on the last day. B I read 15 pages on the first day, then I read 3 pages more than the day before, and I only need to read 12 pages on the last day. How many pages are there in this book? "

3. The ratio of the original number of basketball between school A and school B is 2: 1. If school A gives four basketballs to school B, the basketball quantity ratio between school A and school B is 4:3. How many basketballs are there in a school?