Warren had some pastries.
25 of them were tarts. The rest were biscuits. He sold
35 of the tarts and 7 biscuits. In the end, he had 50 pastries left. How many more tarts than biscuits did he sell?
| |
Tarts |
Biscuits |
Comparing pastries
at first |
2x5 =
10 u |
3x5 =
15 u |
Before
|
5x2 =
10 u |
15 u |
Change
|
- 3x2 =
- 6 u |
- 7 |
After
|
2x2 =
4 u |
15 u - 7 |
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
= 4 u + 15 u - 7
= 19 u - 7
19 u - 7 = 50
19 u = 50 + 7
19 u = 57
1 u = 57 ÷ 19 = 3
Number of more tarts than biscuits that Warren sold
= 6 u - 7
= 6 x 3 - 7
= 18 - 7
= 11
Answer(s): 11
