Pamela spent
23 of her money on 13 markers and 9 notebooks. The cost of each notebook is 3 times the cost of each marker. She bought some more markers with
34 of her remaining money. How many markers did Pamela buy altogether?
| 13 markers + 9 notebooks |
Remaining
amount |
Total
amount |
| 2 p = 40 u |
1 p = 20 u |
3 p |
13
markers |
9
notebooks |
More markers |
Left |
|
| |
|
3 |
1 |
|
| 13 u |
27 u |
15 u |
|
|
Cost of 1 marker = 1 u
Cost of 1 notebook = 3 u
Cost of 13 markers = 13 x 1 u = 13 u
Cost of 9 notebooks = 9 x 3 u = 27 u
Cost of 13 markers + 9 notebooks
= 13 u + 27 u
= 40 u
2 p = 40 u
1 p = 40 u ÷ 2 = 20 u
Amount of remaining money that Pamela spent on buying more markers
=
34 x 20 u
= 15 u
Number of markers that Pamela bought with
34 of her remaining money
= 15 u ÷ 1 u
= 15
Total number of markers that Pamela bought
= 13 + 15
= 28
Answer(s): 28
