Aunt Usha made 90 less shortbreads than croissants. After she gave 0.7 of the shortbreads and
25 of the croissants to Hilda, she was left with 81 less shortbreads than croissants. How many croissants did she make?
| |
Shortbreads |
Croissants |
Comparing shortbreads
and croissants at first |
|
90 more |
Before |
10 u |
5x2 + 90 =
10 u + 90 |
Change |
- 7 u |
- 2x2 - 36 =
- 4 u - 36
|
After |
3 u |
3x2 + 54 =
6 u + 54 |
Comparing shortbreads
and croissants in the end |
|
81 more |
0.7 =
710 25 x 90 = 36
Number of croissants that Aunt Usha gave to Hilda = 4 u + 36
If Aunt Usha made another 81 shortbreads in the end, the number of shortbreads and croissants in the end would be the same.
6 u + 54 = 3 u + 81
6 u - 3 u = 81 - 54
3 u = 27
1 u = 27 ÷ 3 = 9
Number of croissants that Aunt Usha made
= 10 u + 90
= 10 x 9 + 90
= 90 + 90
= 180
Answer(s): 180
