Aunt Mary made 50 less wafers than biscuits. After she gave 0.9 of the wafers and
35 of the biscuits to Nicole, she was left with 65 less wafers than biscuits. How many biscuits did she make?
| |
Wafers |
Biscuits |
Comparing wafers
and biscuits at first |
|
50 more |
Before |
10 u |
5x2 + 50 =
10 u + 50 |
Change |
- 9 u |
- 3x2 - 30 =
- 6 u - 30
|
After |
1 u |
2x2 + 20 =
4 u + 20 |
Comparing wafers
and biscuits in the end |
|
65 more |
0.9 =
910 35 x 50 = 30
Number of biscuits that Aunt Mary gave to Nicole = 6 u + 30
If Aunt Mary made another 65 wafers in the end, the number of wafers and biscuits in the end would be the same.
4 u + 20 = 1 u + 65
4 u - 1 u = 65 - 20
3 u = 45
1 u = 45 ÷ 3 = 15
Number of biscuits that Aunt Mary made
= 10 u + 50
= 10 x 15 + 50
= 150 + 50
= 200
Answer(s): 200
