Bobby had some pastries.
25 of them were cupcakes. The rest were tarts. He sold
35 of the cupcakes and 17 tarts. In the end, he had 116 pastries left. How many pastries did he sell?
| |
Cupcakes |
Tarts |
Comparing pastries
at first |
2x5 =
10 u |
3x5 =
15 u |
Before
|
5x2 =
10 u |
15 u |
Change
|
- 3x2 =
- 6 u |
- 17 |
After
|
2x2 =
4 u |
15 u - 17 |
The number of cupcakes at first is repeated. Make the number of cupcakes at first the same. LCM of 2 and 5 is 10.
Total number of pastries left
= 4 u + 15 u - 17
= 19 u - 17
19 u - 17 = 116
19 u = 116 + 17
19 u = 133
1 u = 133 ÷ 19 = 7
Number of pastries that Bobby sold
= 6 u + 17
= 6 x 7 + 17
= 42 + 17
= 59
Answer(s): 59
