In 10 years, P will be as old as Q is now. Twenty years ago, Q was twice as old as P was then. How old is P now? Choose the correct choice from the following answers
A) 30  B) 35  C) 40  D) 45  E) 50
Q = P+10   Q-20 = 2(P-20)   P-10 = 2P-40   P = 30   The answer is 30.
<result>A</result>
In 10 years, P will be as old as Q is now. Twenty years ago, Q was twice as old as P was then. How old is P now?