Fiona had 10 more croissants than Shiyun at first. After Fiona ate 6 croissants, she had thrice as many croissants as Shiyun in the end. How many croissants did Shiyun have?
| |
Shiyun |
Fiona |
| Before |
1 u |
1 u + 10 |
| Change |
|
- 6 |
| After |
1 u |
1 u + 4 |
Comparing Shiyun
and Fiona in the end |
1 u |
3 u |
The number of croissants that Shiyun had remains unchanged.
Number of croissants that Fiona had in the end
= 3 x 1 u
= 3 u
3 u = 1 u + 4
3 u - 1 u = 4
2 u = 4
1 u = 4 ÷ 2 = 2
Number of croissants that Shiyun had
= 1 u
= 2
Answer(s): 2
