Four years ago, the ratio of ages of P and Q was 5:3. Ten years from now, the ratio of their ages will be 6:5. What is P's age at present?	Choose the correct choice.
A) 11
B) 12
C) 13
D) 14
E) 15
3(P-4)/5 = (Q-4). Then Q = 3(P-4)/5 + 4   5(P+10)/6 = Q+10   5(P+10)/6 = 3(P-4)/5 + 14   25P+250 = 18P + 348   7P = 98   P = 14   The answer is 14.
<result>D</result>
Four years ago, the ratio of ages of P and Q was 5:3. Ten years from now, the ratio of their ages will be 6:5. What is P's age at present?