Ellie and Robert had an equal number of sweets at first. After Ellie bought another 9 sweets and Robert lost 25 sweets, Ellie had thrice as many sweets as Robert. Find the number of sweets each of them had at first.
| |
Ellie |
Robert |
| Before |
3 u - 9 |
1 u + 25 |
| Change |
+ 9 |
- 25 |
| After |
3 u |
1 u |
The number of sweets that Ellie and Robert at first is the same.
3 u - 9 = 1 u + 25
3 u - 1 u = 25 + 9
2 u = 34
1 u = 34 ÷ 2 = 17
Number of sweets that each of them had at first
= 1 u + 25
= 17 + 25
= 42
Answer(s): 42
