Aunt Dana made 100 more biscuits than puffs. After she gave 0.9 of the biscuits and
35 of the puffs to Shiyun, she was left with 85 more biscuits than puffs. How many biscuits did she make?
| |
Biscuits |
Puffs |
Comparing biscuits
and puffs at first |
|
100 more |
Before |
10 u |
5x2 + 100 =
10 u + 100 |
Change |
- 9 u |
- 3x2 - 60 =
- 6 u - 60
|
After |
1 u |
2x2 + 40 =
4 u + 40 |
Comparing biscuits
and puffs in the end |
|
85 more |
0.9 =
910 35 x 100 = 60
Number of puffs that Aunt Dana gave to Shiyun = 6 u + 60
If Aunt Dana made another 85 biscuits in the end, the number of biscuits and puffs in the end would be the same.
4 u + 40 = 1 u + 85
4 u - 1 u = 85 - 40
3 u = 45
1 u = 45 ÷ 3 = 15
Number of biscuits that Aunt Dana made
= 10 u
= 10 x 15
= 150
Answer(s): 150
