Aunt Esther made 75 more puffs than biscuits. After she gave 0.7 of the puffs and
25 of the biscuits to Fanny, she was left with 105 more puffs than biscuits. How many puffs did she make?
| |
Puffs |
Biscuits |
Comparing puffs
and biscuits at first |
|
75 more |
Before |
10 u |
5x2 + 75 =
10 u + 75 |
Change |
- 7 u |
- 2x2 - 30 =
- 4 u - 30
|
After |
3 u |
3x2 + 45 =
6 u + 45 |
Comparing puffs
and biscuits in the end |
|
105 more |
0.7 =
710 25 x 75 = 30
Number of biscuits that Aunt Esther gave to Fanny = 4 u + 30
If Aunt Esther made another 105 puffs in the end, the number of puffs and biscuits in the end would be the same.
6 u + 45 = 3 u + 105
6 u - 3 u = 105 - 45
3 u = 60
1 u = 60 ÷ 3 = 20
Number of puffs that Aunt Esther made
= 10 u
= 10 x 20
= 200
Answer(s): 200
