Elijah is 7 years old now. His brother is 30 years older than him. How old will Elijah be when his age is
38 of his brother's age?
| |
Elijah |
His brother |
Difference |
| Before |
|
|
30 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
8 u |
5 u |
The difference in the age between Elijah and his brother at first and in the end remains unchanged.
Number of years that his brother is older than Elijah
= 8 u - 3 u
= 5 u
5 u = 30
1 u = 30 ÷ 5 = 6
Elijah's age when his age is
38 of his brother's age
= 3 u
= 3 x 6
= 18
Answer(s): 18
