Aunt Min made 45 less wafers than muffins. After she gave 0.7 of the wafers and
25 of the muffins to Lucy, she was left with 87 less wafers than muffins. How many muffins did she make?
| |
Wafers |
Muffins |
Comparing wafers
and muffins at first |
|
45 more |
Before |
10 u |
5x2 + 45 =
10 u + 45 |
Change |
- 7 u |
- 2x2 - 18 =
- 4 u - 18
|
After |
3 u |
3x2 + 27 =
6 u + 27 |
Comparing wafers
and muffins in the end |
|
87 more |
0.7 =
710 25 x 45 = 18
Number of muffins that Aunt Min gave to Lucy = 4 u + 18
If Aunt Min made another 87 wafers in the end, the number of wafers and muffins in the end would be the same.
6 u + 27 = 3 u + 87
6 u - 3 u = 87 - 27
3 u = 60
1 u = 60 ÷ 3 = 20
Number of muffins that Aunt Min made
= 10 u + 45
= 10 x 20 + 45
= 200 + 45
= 245
Answer(s): 245
