Xuan and Rachel had an equal number of mini cupcakes. After Xuan bought another 22 mini cupcakes and Rachel bought another 4 mini cupcakes, Xuan had thrice as many mini cupcakes as Rachel. Find the number of mini cupcakes that each of them had at first.
| |
Xuan |
Rachel |
| Before |
3 u - 22 |
1 u - 4 |
| Change |
+ 22 |
+ 4 |
| After |
3 u |
1 u |
The number of mini cupcakes that Xuan and Rachel had at first is the same.
3 u - 22 = 1 u - 4
3 u - 1 u = 22 - 4
2 u = 18
1 u = 18 ÷ 2 = 9
Number of mini cupcakes that each had at first
= 9 - 4
= 5
Answer(s): 5
