Task: Question Answering
Input (English): Problem: if x , y , and z are positive real numbers such that x + y - z = 62 , y - z + x = 82 , and z - x + y = 100 , then find the x + y + z value ? 
Options: a ) 80 , b ) 91 , c ) 62 , d ) 74 , e ) 82
Output (English): e