Olivia and Irene had the same number of stickers. After Olivia had given away 72 stickers, Irene had 5 times as many stickers as Olivia. How many stickers did each of them have at first?
| |
Olivia |
Irene |
| Before |
1 u + 72 |
5 u |
| Change |
- 72 |
|
| After |
1 u |
5 u |
Number of stickers that Irene had remains unchanged.
Number of stickers that Olivia and Irene had at first is equal.
5 u = 1 u + 72
5 u - 1 u = 72
4 u = 72
1 u = 72 ÷ 4= 18
Number of stickers that each of them had at first
= 1 u + 72
= 18 + 72
= 90
Answer(s): 90
