Number train
The numbers 1,2,3,4,5,6,7,8, and 9 traveled by train. The train had three cars, and each was carrying just three numbers. No. 1 rode in the first carriage, and in the last were all odd numbers. The conductor calculated the sum of the numbers in the first, second, and last car, and each time, he came out with the same sum. Determine how numbers can be divided into the car. How many have these problem solutions?
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