Task: Question Answering
Input (English): Problem: if x = 1 - 4 t and y = 2 t - 2 , then for what value of t does x = y ? 
Options: a ) 5 / 2 , b ) 1 / 2 , c ) 2 / 3 , d ) 2 / 5 , e ) 0
Output (English): b