Gillian spent
34 of her money on 13 notebooks and 8 pens. The cost of each pen is 4 times the cost of each notebook. She bought some more notebooks with
23 of her remaining money. How many notebooks did Gillian buy altogether?
| 13 notebooks + 8 pens |
Remaining
amount |
Total
amount |
| 3 p = 45 u |
1 p = 15 u |
4 p |
13
notebooks |
8
pens |
More notebooks |
Left |
|
| |
|
2 |
1 |
|
| 13 u |
32 u |
10 u |
|
|
Cost of 1 notebook = 1 u
Cost of 1 pen = 4 u
Cost of 13 notebooks = 13 x 1 u = 13 u
Cost of 8 pens = 8 x 4 u = 32 u
Cost of 13 notebooks + 8 pens
= 13 u + 32 u
= 45 u
3 p = 45 u
1 p = 45 u ÷ 3 = 15 u
Amount of remaining money that Gillian spent on buying more notebooks
=
23 x 15 u
= 10 u
Number of notebooks that Gillian bought with
23 of her remaining money
= 10 u ÷ 1 u
= 10
Total number of notebooks that Gillian bought
= 13 + 10
= 23
Answer(s): 23
