In a shop, the number of cartons of pear juice sold was
14 the number of cartons left. When 65 more cartons were sold, the total number of cartons sold was 5 less than
910 the number of cartons the shop had at first. How many cartons were left?
| |
Sold |
Left |
Total |
| Before |
1x2 =
2 u |
4x2 =
8 u |
5x2 =
10 u
|
| Change |
+ 65 |
- 65 |
|
| After |
2 u + 65 |
8 u - 65 |
10 u |
Comparing the total
number of cartons
sold and the total number of cartons at first |
9x1 - 5 =
9 u - 5 |
|
10x1 =
10 u |
The total number of cartons is repeated. Make the total number of cartons the same. LCM of 5 and 10 is 10.
The number of cartons sold in the end is repeated.
9 u - 5 = 2 u + 65
9 u - 2 u = 65 + 5
7 u = 70
1 u = 70 ÷ 7 = 10
Number of cartons left
= 8 u - 65
= 8 x 10 - 65
= 80 - 65
= 15
Answer(s): 15
