Xuan and Hilda had an equal number of mini cupcakes. After Xuan bought another 25 mini cupcakes and Hilda bought another 7 mini cupcakes, Xuan had thrice as many mini cupcakes as Hilda. Find the number of mini cupcakes that each of them had at first.
| |
Xuan |
Hilda |
| Before |
3 u - 25 |
1 u - 7 |
| Change |
+ 25 |
+ 7 |
| After |
3 u |
1 u |
The number of mini cupcakes that Xuan and Hilda had at first is the same.
3 u - 25 = 1 u - 7
3 u - 1 u = 25 - 7
2 u = 18
1 u = 18 ÷ 2 = 9
Number of mini cupcakes that each had at first
= 9 - 7
= 2
Answer(s): 2
