For all real numbers v, an operation is defined by the equation v* = v - v/3. If (v*)* = 24, then v=	Choose the correct answer
A) 45 B) 48 C) 51 D) 54 E) 57

Rationale: "( v * ) * = ( v - v / 3 ) - ( v - v / 3 ) / 3 24 = 2 v / 3 - 2 v / 9 = 4 v / 9 v = 54 the answer is d ."
Answer: D