Yoko spent
25 of her money on 4 staplers and 7 folders. The cost of one folder was four times the cost of one stapler. She bought some more folders with
14 of her remaining money. How many folders did Yoko buy altogether?
4 staplers and
7 folders |
Remaining amount |
| 2x4 |
3x4 |
| |
More folders |
Left |
| |
1x3 |
3x3 |
| 8 p |
3 p |
9 p |
Cost of 1 stapler = 1 u
Cost of 1 folder = 4 u
Cost of 4 staplers = 4 x 1 u = 4 u
Cost of 7 folders = 7 x 4 u = 28 u
Total cost of 4 staplers and 7 folders
= 4 u + 28 u
= 32 u
8 p = 32 u
1 p = 32 ÷ 8 = 4 u
Amount that Yoko used to buy more folders
= 3 p
= 3 x 4 u
= 12 u
Number of more folders that Yoko bought
= 12 u ÷ 4 u
= 3
Total number of folders that Yoko bought
= 7 + 3
= 10
Answer(s): 10
