Ryan had some pastries.
27 of them were tarts. The rest were biscuits. He sold
25 of the tarts and 19 biscuits. In the end, he had 167 pastries left. How many pastries did he sell?
| |
Tarts |
Biscuits |
Comparing pastries
at first |
2x5 =
10 u |
5x5 =
25 u |
Before
|
5x2 =
10 u |
25 u |
Change
|
- 2x2 =
- 4 u |
- 19 |
After
|
3x2 =
6 u |
25 u - 19 |
The number of tarts at first is repeated. Make the number of tarts at first the same. LCM of 2 and 5 is 10.
Total number of pastries left
= 6 u + 25 u - 19
= 31 u - 19
31 u - 19 = 167
31 u = 167 + 19
31 u = 186
1 u = 186 ÷ 31 = 6
Number of pastries that Ryan sold
= 4 u + 19
= 4 x 6 + 19
= 24 + 19
= 43
Answer(s): 43
