Bryan is 54 years old.
Adam is 33 years old.
A few years ago, Bryan was 4 times as old as Adam.
- How many years ago was Bryan 4 times as old as Adam?
- How old was Bryan then?
|
Bryan |
Adam |
Difference |
Before |
4 u |
1 u |
3 u |
Change |
+ ? |
+ ? |
|
After |
54 |
33 |
21 |
(a)
For Bryan to be 4 times as old as Adam,
Adam's age = 1 u
Bryan's age = 4 u
Difference in their age
= 4 u - 1 u
= 3 u
Age difference between Bryan and Adam
= 54 - 33
= 21
3 u = 21
1 u = 21 ÷ 3 = 7
Number of years' ago that Bryan was 4 times as old as Adam
= 33 - 7
= 26
(b)
Bryan's age 26 years ago
= 4 u
= 4 x 7
= 28
Answer(s): (a) 26; (b) 28