PSLEShiyun made some sandwiches to sell.
34 of them were kaya sandwiches and the rest were curry sandwiches. After selling 133 curry sandwiches and
56 of the kaya sandwiches, she had
15 of the sandwiches left. How many sandwiches did Shiyun sell?
|
Kaya sandwiches |
Curry sandwiches |
Total |
Comparing kaya sandwiches and curry sandwiches at first |
3x2 |
1x2 |
4x2
|
Before |
6x1 |
|
|
Change |
- 5x1
|
- 133 |
|
After |
1x1
|
|
|
|
Kaya sandwiches |
Curry sandwiches |
Total |
Before |
6 u |
2 u |
8 u
|
Change |
- 5 u
|
- 133 |
|
After
|
1 u
|
2 u - 133
|
15 x 8 u = 135 u |
The number of kaya sandwiches at first is repeated. Make the number of kaya sandwiches at first the same. LCM of 3 and 6 is 6.
Number of sandwiches left
= 1 u + 2 u - 133
= 3 u - 133
3 u - 133 = 1
35 u
3 u - 1
35 u = 133
1
25 u = 133
1 u = 133 ÷ 1
25 = 95
Total number of sandwiches that Shiyun sold
= 5 u + 133
= 5 x 95 + 133
= 475 + 133
= 608
Answer(s): 608