4 years ago, Paula was 4 times as old as Karl. In 4 years, Paula will be twice as old as Karl. What is the sum of their ages now?  Choose the correct choice from the following answers:
A) 22
B) 24
C) 26
D) 28
E) 30
P-4 = 4(K-4) and so P = 4K-12   P+4 = 2(K+4)   (4K-12)+4 = 2K+8   K = 8   P = 20   P+K = 28   The answer is 28.
<result>D</result>
4 years ago, Paula was 4 times as old as Karl. In 4 years, Paula will be twice as old as Karl. What is the sum of their ages now?