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 train 800 m long can cross a pole in 10 sec and then find the speed of the train ?
answer:
28


question:
Problem: if a mixture is 1 ⁄ 7 alcohol by volume and 2 ⁄ 7 water by volume , what is the ratio of the volume of alcohol to the volume of water in this mixture ?
answer:

1 / 2