For all real numbers v, an operation is defined by the equation v* = v - v/3. If (v*)* = 20, then v=  Choose the correct answer.
A) 36	B) 39	C) 42	D) 45	E) 48
(v*)* = (v - v/3) - (v - v/3) / 3   20 = 2v/3 - 2v/9 = 4v/9   v = 45   The answer is 45.
<result>D</result>
For all real numbers v, an operation is defined by the equation v* = v - v/3. If (v*)* = 20, then v=