PSLEBetty made some puffs to sell.
34 of them were chicken puffs and the rest were beef puffs. After selling 231 beef puffs and
56 of the chicken puffs, she had
15 of the puffs left. How many puffs did Betty sell?
|
Chicken puffs |
Beef puffs |
Total |
Comparing chicken puffs and beef puffs at first |
3x2 |
1x2 |
4x2
|
Before |
6x1 |
|
|
Change |
- 5x1
|
- 231 |
|
After |
1x1
|
|
|
|
Chicken puffs |
Beef puffs |
Total |
Before |
6 u |
2 u |
8 u
|
Change |
- 5 u
|
- 231 |
|
After
|
1 u
|
2 u - 231
|
15 x 8 u = 135 u |
The number of chicken puffs at first is repeated. Make the number of chicken puffs at first the same. LCM of 3 and 6 is 6.
Number of puffs left
= 1 u + 2 u - 231
= 3 u - 231
3 u - 231 = 1
35 u
3 u - 1
35 u = 231
1
25 u = 231
1 u = 231 ÷ 1
25 = 165
Total number of puffs that Betty sold
= 5 u + 231
= 5 x 165 + 231
= 825 + 231
= 1056
Answer(s): 1056