PSLECathy made some buns to sell.
34 of them were chocolate buns and the rest were kaya buns. After selling 385 kaya buns and
56 of the chocolate buns, she had
15 of the buns left. How many buns did Cathy sell?
|
Chocolate buns |
Kaya buns |
Total |
Comparing chocolate buns and kaya buns at first |
3x2 |
1x2 |
4x2
|
Before |
6x1 |
|
|
Change |
- 5x1
|
- 385 |
|
After |
1x1
|
|
|
|
Chocolate buns |
Kaya buns |
Total |
Before |
6 u |
2 u |
8 u
|
Change |
- 5 u
|
- 385 |
|
After
|
1 u
|
2 u - 385
|
15 x 8 u = 135 u |
The number of chocolate buns at first is repeated. Make the number of chocolate buns at first the same. LCM of 3 and 6 is 6.
Number of buns left
= 1 u + 2 u - 385
= 3 u - 385
3 u - 385 = 1
35 u
3 u - 1
35 u = 385
1
25 u = 385
1 u = 385 ÷ 1
25 = 275
Total number of buns that Cathy sold
= 5 u + 385
= 5 x 275 + 385
= 1375 + 385
= 1760
Answer(s): 1760