Aunt Shiyun made 40 less croissants than cookies. After she gave 0.9 of the croissants and
35 of the cookies to Xylia, she was left with 40 less croissants than cookies. How many cookies did she make?
| |
Croissants |
Cookies |
Comparing croissants
and cookies at first |
|
40 more |
Before |
10 u |
5x2 + 40 =
10 u + 40 |
Change |
- 9 u |
- 3x2 - 24 =
- 6 u - 24
|
After |
1 u |
2x2 + 16 =
4 u + 16 |
Comparing croissants
and cookies in the end |
|
40 more |
0.9 =
910 35 x 40 = 24
Number of cookies that Aunt Shiyun gave to Xylia = 6 u + 24
If Aunt Shiyun made another 40 croissants in the end, the number of croissants and cookies in the end would be the same.
4 u + 16 = 1 u + 40
4 u - 1 u = 40 - 16
3 u = 24
1 u = 24 ÷ 3 = 8
Number of cookies that Aunt Shiyun made
= 10 u + 40
= 10 x 8 + 40
= 80 + 40
= 120
Answer(s): 120
