instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: if | x - 9 | = 3 x , then x = ?
answer:
- 4.


question:
Problem: a certain bacteria colony doubles in size every day for 25 days , at which point it reaches the limit of its habitat and can no longer grow . if two bacteria colonies start growing simultaneously , how many days will it take them to reach the habitat ’ s limit ?
answer:
2


question:
Problem: a man can do a piece of work in 5 days , but with the help of his son , he can finish it in 4 days . in what time can the son do it alone ?
answer:

2