Kylie and Rachel had an equal number of mini cupcakes. After Kylie bought another 21 mini cupcakes and Rachel bought another 5 mini cupcakes, Kylie had thrice as many mini cupcakes as Rachel. Find the number of mini cupcakes that each of them had at first.
| |
Kylie |
Rachel |
| Before |
3 u - 21 |
1 u - 5 |
| Change |
+ 21 |
+ 5 |
| After |
3 u |
1 u |
The number of mini cupcakes that Kylie and Rachel had at first is the same.
3 u - 21 = 1 u - 5
3 u - 1 u = 21 - 5
2 u = 16
1 u = 16 ÷ 2 = 8
Number of mini cupcakes that each had at first
= 8 - 5
= 3
Answer(s): 3
