Xandra spent
38 of her money on 8 notebooks and 10 folders. The cost of one folder was four times the cost of one notebook. She bought some more folders with
14 of her remaining money. How many folders did Xandra buy altogether?
8 notebooks and
10 folders |
Remaining amount |
| 3x4 |
5x4 |
| |
More folders |
Left |
| |
1x5 |
3x5 |
| 12 p |
5 p |
15 p |
Cost of 1 notebook = 1 u
Cost of 1 folder = 4 u
Cost of 8 notebooks = 8 x 1 u = 8 u
Cost of 10 folders = 10 x 4 u = 40 u
Total cost of 8 notebooks and 10 folders
= 8 u + 40 u
= 48 u
12 p = 48 u
1 p = 48 ÷ 12 = 4 u
Amount that Xandra used to buy more folders
= 5 p
= 5 x 4 u
= 20 u
Number of more folders that Xandra bought
= 20 u ÷ 4 u
= 5
Total number of folders that Xandra bought
= 10 + 5
= 15
Answer(s): 15
