Emily bought thrice as many croissants as Luis. After Emily ate 3 croissants, she had 11 more croissants than Luis. How many croissants did they buy altogether?
| |
Emily |
Luis |
Total |
| Before |
3 u |
1 u |
4 u |
| Change |
- 3 |
|
|
| After |
3 u - 3 |
1 u |
|
The number of croissants that Luis had remains unchanged.
If Luis had another 11 croissants in the end, the number of croissants that Emily and Luis had would be the same.
3 u - 3 = 1 u + 11
3 u - 1 u = 11 + 3
2 u = 14
1 u = 14 ÷ 2 = 7
Total number of croissants
= 3 u + 1 u
= 4 u
= 4 x 7
= 28
Answer(s): 28
