Aunt Zara made 100 more wafers than cupcakes. After she gave 0.7 of the wafers and
25 of the cupcakes to Xylia, she was left with 120 more wafers than cupcakes. How many wafers did she make?
| |
Wafers |
Cupcakes |
Comparing wafers
and cupcakes at first |
|
100 more |
Before |
10 u |
5x2 + 100 =
10 u + 100 |
Change |
- 7 u |
- 2x2 - 40 =
- 4 u - 40
|
After |
3 u |
3x2 + 60 =
6 u + 60 |
Comparing wafers
and cupcakes in the end |
|
120 more |
0.7 =
710 25 x 100 = 40
Number of cupcakes that Aunt Zara gave to Xylia = 4 u + 40
If Aunt Zara made another 120 wafers in the end, the number of wafers and cupcakes in the end would be the same.
6 u + 60 = 3 u + 120
6 u - 3 u = 120 - 60
3 u = 60
1 u = 60 ÷ 3 = 20
Number of wafers that Aunt Zara made
= 10 u
= 10 x 20
= 200
Answer(s): 200
