Aunt Xuan made 100 less biscuits than wafers. After she gave 0.9 of the biscuits and
35 of the wafers to Wendy, she was left with 94 less biscuits than wafers. How many wafers did she make?
| |
Biscuits |
Wafers |
Comparing biscuits
and wafers 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 wafers in the end |
|
94 more |
0.9 =
910 35 x 100 = 60
Number of wafers that Aunt Xuan gave to Wendy = 6 u + 60
If Aunt Xuan made another 94 biscuits in the end, the number of biscuits and wafers in the end would be the same.
4 u + 40 = 1 u + 94
4 u - 1 u = 94 - 40
3 u = 54
1 u = 54 ÷ 3 = 18
Number of wafers that Aunt Xuan made
= 10 u + 100
= 10 x 18 + 100
= 180 + 100
= 280
Answer(s): 280
