two brothers took the gmat exam , the higher score is x and the lower one is y . if the difference between the two scores is 1 / 3 , what is the value of y / x ?
"answer is d : 1 / 4 x - y = ( x + y ) / 3 solving for y / x = 1 / 4"
add(3, divide(multiply(3, 1), 3))