PSLEEva made some sandwiches to sell.
34 of them were kaya sandwiches and the rest were sardine sandwiches. After selling 215 sardine sandwiches and
56 of the kaya sandwiches, she had
16 of the sandwiches left. How many sandwiches did Eva sell?
|
Kaya sandwiches |
Sardine sandwiches |
Total |
Comparing kaya sandwiches and sardine sandwiches at first |
3x2 |
1x2 |
4x2
|
Before |
6x1 |
|
|
Change |
- 5x1
|
- 215 |
|
After |
1x1
|
|
|
|
Kaya sandwiches |
Sardine sandwiches |
Total |
Before |
6 u |
2 u |
8 u
|
Change |
- 5 u
|
- 215 |
|
After
|
1 u
|
2 u - 215
|
16 x 8 u = 113 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 - 215
= 3 u - 215
3 u - 215 = 1
13 u
3 u - 1
13 u = 215
1
23 u = 215
1 u = 215 ÷ 1
23 = 129
Total number of sandwiches that Eva sold
= 5 u + 215
= 5 x 129 + 215
= 645 + 215
= 860
Answer(s): 860