Question 1023653
let h = Harry's present age
;
Harry is in three years 2 times as old as he was 6 years ago.
 How old is Harry now?
h + 3 = 2(h-6)
h + 3 = 2h - 12
3 + 12 = 2h - h
15 = h, Harry is 15
:
 In three years? What about 6 years ago? You should be able to find this