Winnie and Rachel had the same number of erasers. After Winnie had given away 70 erasers, Rachel had 3 times as many erasers as Winnie. How many erasers did each of them have at first?
| |
Winnie |
Rachel |
| Before |
1 u + 70 |
3 u |
| Change |
- 70 |
|
| After |
1 u |
3 u |
Number of erasers that Rachel had remains unchanged.
Number of erasers that Winnie and Rachel had at first is equal.
3 u = 1 u + 70
3 u - 1 u = 70
2 u = 70
1 u = 70 ÷ 2= 35
Number of erasers that each of them had at first
= 1 u + 70
= 35 + 70
= 105
Answer(s): 105
