Pierre is 8 years older than Tom. 13 years ago, the sum of their age was 52. How old is Tom now?
|
Pierre |
Tom |
Difference |
Total |
Before |
1 u + 8 |
1 u |
8 |
52 |
Change |
+ 13 |
+ 13 |
|
+ 26 |
After |
1 u + 21 |
1 u + 13 |
8 |
2 u + 34 |
The difference in the age between Pierre and Tom remains unchanged.
Tom's current age = 1 u
Pierre's current age = 1 u + 8
Combined age of Pierre and Johny 13 years ago
= 1 u + 1 u + 8
= 2 u + 8
2 u + 8 = 52
2 u = 52 - 8
2 u = 44
1 u = 44 ÷ 2 = 22
Tom's current age
= 1 u + 13
= 22 + 13
= 35
Answer(s): 35