Task: Question Answering
Input (English): Problem: sum of two numbers is 50 . two times of the difference of first and seceond is 20 . then the numbers will be ? 
Options: a ) 10 , 40 , b ) 20 , 30 , c ) 35 , 15 , d ) 30 , 20 , e ) 15 , 35
Output (English): d