Zara spent
23 of her money on 12 notebooks and 5 files. The cost of each file is 4 times the cost of each notebook. She bought some more notebooks with
12 of her remaining money. How many notebooks did Zara buy altogether?
| 12 notebooks + 5 files |
Remaining
amount |
Total
amount |
| 2 p = 32 u |
1 p = 16 u |
3 p |
12
notebooks |
5
files |
More notebooks |
Left |
|
| |
|
1 |
1 |
|
| 12 u |
20 u |
8 u |
|
|
Cost of 1 notebook = 1 u
Cost of 1 file = 4 u
Cost of 12 notebooks = 12 x 1 u = 12 u
Cost of 5 files = 5 x 4 u = 20 u
Cost of 12 notebooks + 5 files
= 12 u + 20 u
= 32 u
2 p = 32 u
1 p = 32 u ÷ 2 = 16 u
Amount of remaining money that Zara spent on buying more notebooks
=
12 x 16 u
= 8 u
Number of notebooks that Zara bought with
12 of her remaining money
= 8 u ÷ 1 u
= 8
Total number of notebooks that Zara bought
= 12 + 8
= 20
Answer(s): 20
