Kathy spent
23 of her money on 14 staplers and 6 files. The cost of each file is 3 times the cost of each stapler. She bought some more staplers with
12 of her remaining money. How many staplers did Kathy buy altogether?
| 14 staplers + 6 files |
Remaining
amount |
Total
amount |
| 2 p = 32 u |
1 p = 16 u |
3 p |
14
staplers |
6
files |
More staplers |
Left |
|
| |
|
1 |
1 |
|
| 14 u |
18 u |
8 u |
|
|
Cost of 1 stapler = 1 u
Cost of 1 file = 3 u
Cost of 14 staplers = 14 x 1 u = 14 u
Cost of 6 files = 6 x 3 u = 18 u
Cost of 14 staplers + 6 files
= 14 u + 18 u
= 32 u
2 p = 32 u
1 p = 32 u ÷ 2 = 16 u
Amount of remaining money that Kathy spent on buying more staplers
=
12 x 16 u
= 8 u
Number of staplers that Kathy bought with
12 of her remaining money
= 8 u ÷ 1 u
= 8
Total number of staplers that Kathy bought
= 14 + 8
= 22
Answer(s): 22
