Tiffany and Cathy had an equal number of mochi balls. After Tiffany bought another 24 mochi balls and Cathy bought another 4 mochi balls, Tiffany had thrice as many mochi balls as Cathy. Find the number of mochi balls that each of them had at first.
| |
Tiffany |
Cathy |
| Before |
3 u - 24 |
1 u - 4 |
| Change |
+ 24 |
+ 4 |
| After |
3 u |
1 u |
The number of mochi balls that Tiffany and Cathy had at first is the same.
3 u - 24 = 1 u - 4
3 u - 1 u = 24 - 4
2 u = 20
1 u = 20 ÷ 2 = 10
Number of mochi balls that each had at first
= 10 - 4
= 6
Answer(s): 6
