Gwen spent
27 of her money on 4 staplers and 10 folders. The cost of one folder was twice the cost of one stapler. She bought some more folders with
16 of her remaining money. How many folders did Gwen buy altogether?
4 staplers and
10 folders |
Remaining amount |
| 2x6 |
5x6 |
| |
More folders |
Left |
| |
1x5 |
5x5 |
| 12 p |
5 p |
25 p |
Cost of 1 stapler = 1 u
Cost of 1 folder = 2 u
Cost of 4 staplers = 4 x 1 u = 4 u
Cost of 10 folders = 10 x 2 u = 20 u
Total cost of 4 staplers and 10 folders
= 4 u + 20 u
= 24 u
12 p = 24 u
1 p = 24 ÷ 12 = 2 u
Amount that Gwen used to buy more folders
= 5 p
= 5 x 2 u
= 10 u
Number of more folders that Gwen bought
= 10 u ÷ 2 u
= 5
Total number of folders that Gwen bought
= 10 + 5
= 15
Answer(s): 15
