TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: the average salary of 20 people in the shipping department at a certain firm is $ 1000 . the salary of 10 of the employees is $ 600 each and the salary of 6 of the employees is $ 200 each . what is the average salary of the remaining employees ?

SOLUTION: $ 3200

PROBLEM: Problem: solve the equation for x : 6 x - 47 + 3 x = 4 + 9 - x

SOLUTION: 

PROBLEM: Problem: a is two years older than b who is twice as old as c . if the total of the ages of a , b nd c be 27 , then how old is b ?

SOLUTION:
10