Henry had some pastries.
35 of them were shortbreads. The rest were wafers. He sold
56 of the shortbreads and 9 wafers. In the end, he had 31 pastries left. How many pastries did he sell?
|
Shortbreads |
Wafers |
Comparing pastries at first |
3x2 = 6 u |
2x2 = 4 u |
Before
|
6x1 = 6 u |
4 u |
Change
|
- 5x1 = - 5 u |
- 9 |
After
|
1x1 = 1 u |
4 u - 9 |
The number of shortbreads at first is repeated. Make the number of shortbreads at first the same. LCM of 3 and 6 is 6.
Total number of pastries left
= 1 u + 4 u - 9
= 5 u - 9
5 u - 9 = 31
5 u = 31 + 9
5 u = 40
1 u = 40 ÷ 5 = 8
Number of pastries that Henry sold
= 5 u + 9
= 5 x 8 + 9
= 40 + 9
= 49
Answer(s): 49