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

Ex Input:
Problem: if x and j are integers and 2 x – j = 11 , then 4 x + j can not be

Ex Output:
17


Ex Input:
Problem: a clock shows the time as 10 a . m . if the minute hand gains 5 minutes every hour , how many minutes will the clock gain by 6 p . m . ?

Ex Output:
40 minute


Ex Input:
Problem: running at their respective constant rates , machine x takes 2 days longer to produce w widgets than machine y . at these rates , if the two machines together produce 5 / 4 w widgets in 3 days , how many days would it take machine x alone to produce 3 w widgets ?

Ex Output:

18