Neave had some pastries.
47 of them were macarons. The rest were cookies. He sold
35 of the macarons and 9 cookies. In the end, he had 106 pastries left. How many pastries did he sell?
| |
Macarons |
Cookies |
Comparing pastries
at first |
4x5 =
20 u |
3x5 =
15 u |
Before
|
5x4 =
20 u |
15 u |
Change
|
- 3x4 =
- 12 u |
- 9 |
After
|
2x4 =
8 u |
15 u - 9 |
The number of macarons at first is repeated. Make the number of macarons at first the same. LCM of 4 and 5 is 20.
Total number of pastries left
= 8 u + 15 u - 9
= 23 u - 9
23 u - 9 = 106
23 u = 106 + 9
23 u = 115
1 u = 115 ÷ 23 = 5
Number of pastries that Neave sold
= 12 u + 9
= 12 x 5 + 9
= 60 + 9
= 69
Answer(s): 69
