The average of two numbers is X*Y. If the first number is Y, what is the other number?
(A) 2XY-Y
(B) XY-2Y
(C) 2XY-X
(D) Z
(E) XY-Y
(A) 2XY-Y
(B) XY-2Y
(C) 2XY-X
(D) Z
(E) XY-Y