Bobby had some pastries.
58 of them were biscuits. The rest were muffins. He sold
34 of the biscuits and 6 muffins. In the end, he had 147 pastries left. How many pastries did he sell?
| |
Biscuits |
Muffins |
Comparing pastries
at first |
5x4 =
20 u |
3x4 =
12 u |
Before
|
4x5 =
20 u |
12 u |
Change
|
- 3x5 =
- 15 u |
- 6 |
After
|
1x5 =
5 u |
12 u - 6 |
The number of biscuits at first is repeated. Make the number of biscuits at first the same. LCM of 5 and 4 is 20.
Total number of pastries left
= 5 u + 12 u - 6
= 17 u - 6
17 u - 6 = 147
17 u = 147 + 6
17 u = 153
1 u = 153 ÷ 17 = 9
Number of pastries that Bobby sold
= 15 u + 6
= 15 x 9 + 6
= 135 + 6
= 141
Answer(s): 141
