Jane bought four times as many croissants as Jenson. After Jane ate 7 croissants, she had 11 more croissants than Jenson. How many croissants did they buy altogether?
| |
Jane |
Jenson |
Total |
| Before |
4 u |
1 u |
5 u |
| Change |
- 7 |
|
|
| After |
4 u - 7 |
1 u |
|
The number of croissants that Jenson had remains unchanged.
If Jenson had another 11 croissants in the end, the number of croissants that Jane and Jenson had would be the same.
4 u - 7 = 1 u + 11
4 u - 1 u = 11 + 7
3 u = 18
1 u = 18 ÷ 3 = 6
Total number of croissants
= 4 u + 1 u
= 5 u
= 5 x 6
= 30
Answer(s): 30
