PSLEErika made some croissants to sell.
34 of them were lotus paste croissants and the rest were egg croissants. After selling 320 egg croissants and
56 of the lotus paste croissants, she had
16 of the croissants left. How many croissants did Erika sell?
|
Lotus paste croissants |
Egg croissants |
Total |
Comparing lotus paste croissants and egg croissants at first |
3x2 |
1x2 |
4x2
|
Before |
6x1 |
|
|
Change |
- 5x1
|
- 320 |
|
After |
1x1
|
|
|
|
Lotus paste croissants |
Egg croissants |
Total |
Before |
6 u |
2 u |
8 u
|
Change |
- 5 u
|
- 320 |
|
After
|
1 u
|
2 u - 320
|
16 x 8 u = 113 u |
The number of lotus paste croissants at first is repeated. Make the number of lotus paste croissants at first the same. LCM of 3 and 6 is 6.
Number of croissants left
= 1 u + 2 u - 320
= 3 u - 320
3 u - 320 = 1
13 u
3 u - 1
13 u = 320
1
23 u = 320
1 u = 320 ÷ 1
23 = 192
Total number of croissants that Erika sold
= 5 u + 320
= 5 x 192 + 320
= 960 + 320
= 1280
Answer(s): 1280