Aunt Kathy made 40 less muffins than wafers. After she gave 0.9 of the muffins and
35 of the wafers to Rachel, she was left with 67 less muffins than wafers. How many wafers did she make?
| |
Muffins |
Wafers |
Comparing muffins
and wafers at first |
|
40 more |
Before |
10 u |
5x2 + 40 =
10 u + 40 |
Change |
- 9 u |
- 3x2 - 24 =
- 6 u - 24
|
After |
1 u |
2x2 + 16 =
4 u + 16 |
Comparing muffins
and wafers in the end |
|
67 more |
0.9 =
910 35 x 40 = 24
Number of wafers that Aunt Kathy gave to Rachel = 6 u + 24
If Aunt Kathy made another 67 muffins in the end, the number of muffins and wafers in the end would be the same.
4 u + 16 = 1 u + 67
4 u - 1 u = 67 - 16
3 u = 51
1 u = 51 ÷ 3 = 17
Number of wafers that Aunt Kathy made
= 10 u + 40
= 10 x 17 + 40
= 170 + 40
= 210
Answer(s): 210
