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