In ten years, David will be four times as old as Aaron. Twenty years ago, David was twice as old as Ellen. If David is nine years older than Ellen, how old is Aaron?	Choose the correct option:
A) 1.5–5
B) 6–10
C) 11–15
D) 16–20
E) 21–25
Let David's present age be 'd', 1.5–5aron's present age be 'a' and Ellen's present age be 'e'   In ten years, David will be four times as old as 1.5–5aron --&gt; d+10 = 4(a+10)   Twenty years ago, David was twice as old as Ellen --&gt; d-20 = 2(e-20)   David is seven years older than Ellen --&gt; d = e + 9   e+9-20 = 2e-40   e-11 = 2e-40   e = 29   d = 36   46 = 4a + 40   a = 1.5   1.5–5nswer: 1.5–5
<result>A</result>
In ten years, David will be four times as old as Aaron. Twenty years ago, David was twice as old as Ellen. If David is nine years older than Ellen, how old is Aaron?