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: tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random . what is the probability taht the ticket drawn has a number which is a multiple of 3 or 5 ?

Ex Output:
9 / 20


Ex Input:
Problem: mala and usha shared their water from a bottle . if mala and usha both drank for the same amount of time , but usha only drank 2 / 10 of the total bottle , what was the ratio of mala and usha speed ?

Ex Output:

4 : 1