Zoe spent
37 of her money on 7 glues and 2 folders. The cost of one folder was four times the cost of one glue. She bought some more folders with
15 of her remaining money. How many folders did Zoe buy altogether?
7 glues and
2 folders |
Remaining amount |
| 3x5 |
4x5 |
| |
More folders |
Left |
| |
1x4 |
4x4 |
| 15 p |
4 p |
16 p |
Cost of 1 glue = 1 u
Cost of 1 folder = 4 u
Cost of 7 glues = 7 x 1 u = 7 u
Cost of 2 folders = 2 x 4 u = 8 u
Total cost of 7 glues and 2 folders
= 7 u + 8 u
= 15 u
15 p = 15 u
1 p = 15 ÷ 15 = 1 u
Amount that Zoe used to buy more folders
= 4 p
= 4 x 1 u
= 4 u
Number of more folders that Zoe bought
= 4 u ÷ 4 u
= 1
Total number of folders that Zoe bought
= 2 + 1
= 3
Answer(s): 3
