Bryan is 2 times as old as Adam now.
In 12 years time, their total age is 90 years.
How old is Bryan now?
- How old is Adam now?
- How many years is Adam younger than Bryan?
- How old was Bryan 7 years ago?
|
Bryan |
Adam |
Total |
Now |
2 u |
1 u |
3 u |
Change |
+ 12 |
+ 12 |
+ 24 |
12 years later |
2 u + 12 |
1 u + 12 |
90 |
(a)
Total age of Bryan and Adam now
= 90 - 24
= 66
Now
Bryan's age = 2 u
Adam's age = 1 u
Total age of Bryan and Adam = 3 u
3 u = 66
1 u = 66 ÷ 3 = 22
Adam's age now
= 1 u
= 22
(b)
Number of years that Adam is younger than Bryan
= 2 u - 1 u
= 1 u
= 1 x 22
= 22
(c)
Bryan's age 7 years' ago
= 2 u - 7
= 2 x 22 - 7
= 44 - 7
= 37
Answer(s): (a) 22; (b) 22; (c) 37