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