Alexander and Aria had an equal number of mochi balls at first. After Alexander bought another 5 mochi balls and Aria lost 16 mochi balls, Alexander had four times as many mochi balls as Aria. Find the number of mochi balls each of them had at first.
| |
Alexander |
Aria |
| Before |
4 u - 5 |
1 u + 16 |
| Change |
+ 5 |
- 16 |
| After |
4 u |
1 u |
The number of mochi balls that Alexander and Aria at first is the same.
4 u - 5 = 1 u + 16
4 u - 1 u = 16 + 5
3 u = 21
1 u = 21 ÷ 3 = 7
Number of mochi balls that each of them had at first
= 1 u + 16
= 7 + 16
= 23
Answer(s): 23
