The task is to generate the correct answer for a given math problem.

Problem: if | 5 x - 20 | = 100 , then find the sum of the values of x ?
8

Problem: the average weight of a group of boys is 30 kg . after a boy of weight 45 kg joins the group , the average weight of the group goes up by 1 kg . find the number of boys in the group originally ?
14

Problem: a can do a piece of work in 15 days . a does the work for 5 days only and leaves the job . b does the remaining work in 6 days . in how many days b alone can do the work ?

9 days