The ratio of the present ages of a man and his wife is 8 : 7. Which of the following can't be a possible ratio of their ages 45 years ago?	Pick
A) 6: 8
B) 7: 8
C) 8:8
D) 9: 8
E) 10: 8
8x-45/7x-45 = 9/8   Therefore x=-45   Age cannot be negative.   Answer: 9: 8
<result>D</result>
The ratio of the present ages of a man and his wife is 8 : 7. Which of the following can't be a possible ratio of their ages 45 years ago?