Task: Question Answering
Input (English): Problem: if x is a number such that x ^ 2 + 2 x - 24 = 0 and x ^ 2 - 5 x + 4 = 0 , then x = 
Options: a ) 4 , b ) - 4 , c ) - 3 , d ) - 6 , e ) 1
Output (English): a