Aunt Tina made 50 less macarons than wafers. After she gave 0.9 of the macarons and
25 of the wafers to Jean, she was left with 115 less macarons than wafers. How many wafers did she make?
| |
Macarons |
Wafers |
Comparing macarons
and wafers at first |
|
50 more |
Before |
10 u |
5x2 + 50 =
10 u + 50 |
Change |
- 9 u |
- 2x2 - 20 =
- 4 u - 20
|
After |
1 u |
3x2 + 30 =
6 u + 30 |
Comparing macarons
and wafers in the end |
|
115 more |
0.9 =
910 25 x 50 = 20
Number of wafers that Aunt Tina gave to Jean = 4 u + 20
If Aunt Tina made another 115 macarons in the end, the number of macarons and wafers in the end would be the same.
6 u + 30 = 1 u + 115
6 u - 1 u = 115 - 30
5 u = 85
1 u = 85 ÷ 5 = 17
Number of wafers that Aunt Tina made
= 10 u + 50
= 10 x 17 + 50
= 170 + 50
= 220
Answer(s): 220
