Min spent
35 of her money on 8 markers and 10 files. The cost of one file was four times the cost of one marker. She bought some more files with
14 of her remaining money. How many files did Min buy altogether?
8 markers and
10 files |
Remaining amount |
| 3x2 |
2x2 |
| |
More files |
Left |
| |
1x1 |
3x1 |
| 6 p |
1 p |
3 p |
Cost of 1 marker = 1 u
Cost of 1 file = 4 u
Cost of 8 markers = 8 x 1 u = 8 u
Cost of 10 files = 10 x 4 u = 40 u
Total cost of 8 markers and 10 files
= 8 u + 40 u
= 48 u
6 p = 48 u
1 p = 48 ÷ 6 = 8 u
Amount that Min used to buy more files
= 1 p
= 1 x 8 u
= 8 u
Number of more files that Min bought
= 8 u ÷ 4 u
= 2
Total number of files that Min bought
= 10 + 2
= 12
Answer(s): 12
