Ken and Barbara had the same number of mini cupcakes. After Barbara gave away 21 mini cupcakes and Ken gave away 37 mini cupcakes, Barbara had 3 times as many mini cupcakes as Ken. How many mini cupcakes did each of them have at first?
| |
Ken |
Barbara |
| Before |
1 u + 37 |
3 u + 21 |
| Change |
- 37 |
- 21 |
| After |
1 u |
3 u |
The number of mini cupcakes that Ken and Barbara had at first is the same.
3 u + 21 = 1 u + 37
3 u - 1 u = 37 - 21
2 u = 16
1 u = 16 ÷ 2 = 8
Number of mini cupcakes that each of them had at first
= 1 u + 37
= 8 + 37
= 45
Answer(s): 45
