Min and Nora had the same number of erasers. After Min had given away 69 erasers, Nora had 4 times as many erasers as Min. How many erasers did each of them have at first?
| |
Min |
Nora |
| Before |
1 u + 69 |
4 u |
| Change |
- 69 |
|
| After |
1 u |
4 u |
Number of erasers that Nora had remains unchanged.
Number of erasers that Min and Nora had at first is equal.
4 u = 1 u + 69
4 u - 1 u = 69
3 u = 69
1 u = 69 ÷ 3= 23
Number of erasers that each of them had at first
= 1 u + 69
= 23 + 69
= 92
Answer(s): 92
