Harris and Bryan had an equal number of mini cupcakes at first. After Harris bought another 20 mini cupcakes and Bryan lost 10 mini cupcakes, Harris had four times as many mini cupcakes as Bryan. Find the number of mini cupcakes each of them had at first.
| |
Harris |
Bryan |
| Before |
4 u - 20 |
1 u + 10 |
| Change |
+ 20 |
- 10 |
| After |
4 u |
1 u |
The number of mini cupcakes that Harris and Bryan at first is the same.
4 u - 20 = 1 u + 10
4 u - 1 u = 10 + 20
3 u = 30
1 u = 30 ÷ 3 = 10
Number of mini cupcakes that each of them had at first
= 1 u + 10
= 10 + 10
= 20
Answer(s): 20
