Lee and Gabby had the same number of mochi balls. After Gabby gave away 21 mochi balls and Lee gave away 39 mochi balls, Gabby had 3 times as many mochi balls as Lee. How many mochi balls did each of them have at first?
| |
Lee |
Gabby |
| Before |
1 u + 39 |
3 u + 21 |
| Change |
- 39 |
- 21 |
| After |
1 u |
3 u |
The number of mochi balls that Lee and Gabby had at first is the same.
3 u + 21 = 1 u + 39
3 u - 1 u = 39 - 21
2 u = 18
1 u = 18 ÷ 2 = 9
Number of mochi balls that each of them had at first
= 1 u + 39
= 9 + 39
= 48
Answer(s): 48
