Aunt Sarah made 75 more wafers than croissants. After she gave 0.9 of the wafers and
25 of the croissants to Xandra, she was left with 110 more wafers than croissants. How many wafers did she make?
| |
Wafers |
Croissants |
Comparing wafers
and croissants at first |
|
75 more |
Before |
10 u |
5x2 + 75 =
10 u + 75 |
Change |
- 9 u |
- 2x2 - 30 =
- 4 u - 30
|
After |
1 u |
3x2 + 45 =
6 u + 45 |
Comparing wafers
and croissants in the end |
|
110 more |
0.9 =
910 25 x 75 = 30
Number of croissants that Aunt Sarah gave to Xandra = 4 u + 30
If Aunt Sarah made another 110 wafers in the end, the number of wafers and croissants in the end would be the same.
6 u + 45 = 1 u + 110
6 u - 1 u = 110 - 45
5 u = 65
1 u = 65 ÷ 5 = 13
Number of wafers that Aunt Sarah made
= 10 u
= 10 x 13
= 130
Answer(s): 130
