Aunt Cindy made 75 more tarts than croissants. After she gave 0.9 of the tarts and
25 of the croissants to Esther, she was left with 135 more tarts than croissants. How many tarts did she make?
| |
Tarts |
Croissants |
Comparing tarts
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 tarts
and croissants in the end |
|
135 more |
0.9 =
910 25 x 75 = 30
Number of croissants that Aunt Cindy gave to Esther = 4 u + 30
If Aunt Cindy made another 135 tarts in the end, the number of tarts and croissants in the end would be the same.
6 u + 45 = 1 u + 135
6 u - 1 u = 135 - 45
5 u = 90
1 u = 90 ÷ 5 = 18
Number of tarts that Aunt Cindy made
= 10 u
= 10 x 18
= 180
Answer(s): 180
