Gabriel had some pastries.
38 of them were puffs. The rest were croissants. He sold
34 of the puffs and 3 croissants. In the end, he had 181 pastries left. How many pastries did he sell?
| |
Puffs |
Croissants |
Comparing pastries
at first |
3x4 =
12 u |
5x4 =
20 u |
Before
|
4x3 =
12 u |
20 u |
Change
|
- 3x3 =
- 9 u |
- 3 |
After
|
1x3 =
3 u |
20 u - 3 |
The number of puffs at first is repeated. Make the number of puffs at first the same. LCM of 3 and 4 is 12.
Total number of pastries left
= 3 u + 20 u - 3
= 23 u - 3
23 u - 3 = 181
23 u = 181 + 3
23 u = 184
1 u = 184 ÷ 23 = 8
Number of pastries that Gabriel sold
= 9 u + 3
= 9 x 8 + 3
= 72 + 3
= 75
Answer(s): 75
