Tammy and Jean had the same number of erasers. After Tammy had given away 75 erasers, Jean had 4 times as many erasers as Tammy. How many erasers did each of them have at first?
| |
Tammy |
Jean |
| Before |
1 u + 75 |
4 u |
| Change |
- 75 |
|
| After |
1 u |
4 u |
Number of erasers that Jean had remains unchanged.
Number of erasers that Tammy and Jean had at first is equal.
4 u = 1 u + 75
4 u - 1 u = 75
3 u = 75
1 u = 75 ÷ 3= 25
Number of erasers that each of them had at first
= 1 u + 75
= 25 + 75
= 100
Answer(s): 100
