Task: Question Answering
Input (English): 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 4 w widgets ? 
Options: a ) 4 , b ) 6 , c ) 8 , d ) 24 , e ) 12
Output (English): d