Erika and Gwen had the same number of buttons. After Erika had given away 63 buttons, Gwen had 4 times as many buttons as Erika. How many buttons did each of them have at first?
| |
Erika |
Gwen |
| Before |
1 u + 63 |
4 u |
| Change |
- 63 |
|
| After |
1 u |
4 u |
Number of buttons that Gwen had remains unchanged.
Number of buttons that Erika and Gwen had at first is equal.
4 u = 1 u + 63
4 u - 1 u = 63
3 u = 63
1 u = 63 ÷ 3= 21
Number of buttons that each of them had at first
= 1 u + 63
= 21 + 63
= 84
Answer(s): 84
