Jean bought thrice as many croissants as Julian. After Jean ate 6 croissants, she had 12 more croissants than Julian. How many croissants did they buy altogether?
| |
Jean |
Julian |
Total |
| Before |
3 u |
1 u |
4 u |
| Change |
- 6 |
|
|
| After |
3 u - 6 |
1 u |
|
The number of croissants that Julian had remains unchanged.
If Julian had another 12 croissants in the end, the number of croissants that Jean and Julian had would be the same.
3 u - 6 = 1 u + 12
3 u - 1 u = 12 + 6
2 u = 18
1 u = 18 ÷ 2 = 9
Total number of croissants
= 3 u + 1 u
= 4 u
= 4 x 9
= 36
Answer(s): 36
