Aunt Min made 80 more puffs than biscuits. After she gave 0.9 of the puffs and
35 of the biscuits to Betty, she was left with 62 more puffs than biscuits. How many puffs did she make?
| |
Puffs |
Biscuits |
Comparing puffs
and biscuits at first |
|
80 more |
Before |
10 u |
5x2 + 80 =
10 u + 80 |
Change |
- 9 u |
- 3x2 - 48 =
- 6 u - 48
|
After |
1 u |
2x2 + 32 =
4 u + 32 |
Comparing puffs
and biscuits in the end |
|
62 more |
0.9 =
910 35 x 80 = 48
Number of biscuits that Aunt Min gave to Betty = 6 u + 48
If Aunt Min made another 62 puffs in the end, the number of puffs and biscuits in the end would be the same.
4 u + 32 = 1 u + 62
4 u - 1 u = 62 - 32
3 u = 30
1 u = 30 ÷ 3 = 10
Number of puffs that Aunt Min made
= 10 u
= 10 x 10
= 100
Answer(s): 100
