Vanessa spent
45 of her money on 10 markers and 7 files. The cost of each file is 2 times the cost of each marker. She bought some more markers with
23 of her remaining money. How many markers did Vanessa buy altogether?
| 10 markers + 7 files |
Remaining
amount |
Total
amount |
| 4 p = 24 u |
1 p = 6 u |
5 p |
10
markers |
7
files |
More markers |
Left |
|
| |
|
2 |
1 |
|
| 10 u |
14 u |
4 u |
|
|
Cost of 1 marker = 1 u
Cost of 1 file = 2 u
Cost of 10 markers = 10 x 1 u = 10 u
Cost of 7 files = 7 x 2 u = 14 u
Cost of 10 markers + 7 files
= 10 u + 14 u
= 24 u
4 p = 24 u
1 p = 24 u ÷ 4 = 6 u
Amount of remaining money that Vanessa spent on buying more markers
=
23 x 6 u
= 4 u
Number of markers that Vanessa bought with
23 of her remaining money
= 4 u ÷ 1 u
= 4
Total number of markers that Vanessa bought
= 10 + 4
= 14
Answer(s): 14
