Aunt Yen made 90 less croissants than shortbreads. After she gave 0.9 of the croissants and
35 of the shortbreads to Joelle, she was left with 51 less croissants than shortbreads. How many shortbreads did she make?
| |
Croissants |
Shortbreads |
Comparing croissants
and shortbreads at first |
|
90 more |
Before |
10 u |
5x2 + 90 =
10 u + 90 |
Change |
- 9 u |
- 3x2 - 54 =
- 6 u - 54
|
After |
1 u |
2x2 + 36 =
4 u + 36 |
Comparing croissants
and shortbreads in the end |
|
51 more |
0.9 =
910 35 x 90 = 54
Number of shortbreads that Aunt Yen gave to Joelle = 6 u + 54
If Aunt Yen made another 51 croissants in the end, the number of croissants and shortbreads in the end would be the same.
4 u + 36 = 1 u + 51
4 u - 1 u = 51 - 36
3 u = 15
1 u = 15 ÷ 3 = 5
Number of shortbreads that Aunt Yen made
= 10 u + 90
= 10 x 5 + 90
= 50 + 90
= 140
Answer(s): 140
