Ivory and Penelope had the
same number of mochi balls at first. Ivory gave 18 mochi balls away to her sibling. In the end, Penelope had three times as many mochi balls as Ivory. How many mochi balls did Ivory have at first?
| |
Ivory |
Penelope |
| Before |
3 u |
3 u |
| Change |
- 18 |
|
| After |
1 u |
3 u |
The number of mochi balls that Penelope had remains unchanged.
Number of mochi balls that Ivory gave away
= 3 u - 1 u
= 2 u
2 u = 18
1 u = 18 ÷ 2 = 9
Number of mochi balls that Ivory had at first
= 3 u
= 3 x 9
= 27
Answer(s): 27
