Dylan had some pastries.
38 of them were scones. The rest were biscuits. He sold
25 of the scones and 3 biscuits. In the end, he had 133 pastries left. How many pastries did he sell?
| |
Scones |
Biscuits |
Comparing pastries
at first |
3x5 =
15 u |
5x5 =
25 u |
Before
|
5x3 =
15 u |
25 u |
Change
|
- 2x3 =
- 6 u |
- 3 |
After
|
3x3 =
9 u |
25 u - 3 |
The number of scones at first is repeated. Make the number of scones at first the same. LCM of 3 and 5 is 15.
Total number of pastries left
= 9 u + 25 u - 3
= 34 u - 3
34 u - 3 = 133
34 u = 133 + 3
34 u = 136
1 u = 136 ÷ 34 = 4
Number of pastries that Dylan sold
= 6 u + 3
= 6 x 4 + 3
= 24 + 3
= 27
Answer(s): 27
