Aunt Yoko made 50 more biscuits than shortbreads. After she gave 0.9 of the biscuits and
25 of the shortbreads to Tiffany, she was left with 65 more biscuits than shortbreads. How many biscuits did she make?
| |
Biscuits |
Shortbreads |
Comparing biscuits
and shortbreads at first |
|
50 more |
Before |
10 u |
5x2 + 50 =
10 u + 50 |
Change |
- 9 u |
- 2x2 - 20 =
- 4 u - 20
|
After |
1 u |
3x2 + 30 =
6 u + 30 |
Comparing biscuits
and shortbreads in the end |
|
65 more |
0.9 =
910 25 x 50 = 20
Number of shortbreads that Aunt Yoko gave to Tiffany = 4 u + 20
If Aunt Yoko made another 65 biscuits in the end, the number of biscuits and shortbreads in the end would be the same.
6 u + 30 = 1 u + 65
6 u - 1 u = 65 - 30
5 u = 35
1 u = 35 ÷ 5 = 7
Number of biscuits that Aunt Yoko made
= 10 u
= 10 x 7
= 70
Answer(s): 70
