Jade and Kylie had the same number of buttons. After Jade had given away 80 buttons, Kylie had 3 times as many buttons as Jade. How many buttons did each of them have at first?
|
Jade |
Kylie |
Before |
1 u + 80 |
3 u |
Change |
- 80 |
|
After |
1 u |
3 u |
Number of buttons that Kylie had remains unchanged.
Number of buttons that Jade and Kylie had at first is equal.
3 u = 1 u + 80
3 u - 1 u = 80
2 u = 80
1 u = 80 ÷ 2= 40
Number of buttons that each of them had at first
= 1 u + 80
= 40 + 80
= 120
Answer(s): 120