Jim is now twice as old as Fred, who is two years older than Sam. Seven years ago, Jim was three times as old as Sam. How old is Jim now?
Choose the correct choice from the following:
A) 18 B) 20 C) 24 D) 32 E) 40
J = 2F = 2(S+2) = 2S+4   J-7 = 3*(S-7)   (2S+4)-7 = 3S-21   S = 18 and so J = 40   The answer is 40.
<result>E</result>
Jim is now twice as old as Fred, who is two years older than Sam. Seven years ago, Jim was three times as old as Sam. How old is Jim now?