Natalie spent
23 of her money on 10 markers and 6 files. The cost of each file is 3 times the cost of each marker. She bought some more markers with
12 of her remaining money. How many markers did Natalie buy altogether?
| 10 markers + 6 files |
Remaining
amount |
Total
amount |
| 2 p = 28 u |
1 p = 14 u |
3 p |
10
markers |
6
files |
More markers |
Left |
|
| |
|
1 |
1 |
|
| 10 u |
18 u |
7 u |
|
|
Cost of 1 marker = 1 u
Cost of 1 file = 3 u
Cost of 10 markers = 10 x 1 u = 10 u
Cost of 6 files = 6 x 3 u = 18 u
Cost of 10 markers + 6 files
= 10 u + 18 u
= 28 u
2 p = 28 u
1 p = 28 u ÷ 2 = 14 u
Amount of remaining money that Natalie spent on buying more markers
=
12 x 14 u
= 7 u
Number of markers that Natalie bought with
12 of her remaining money
= 7 u ÷ 1 u
= 7
Total number of markers that Natalie bought
= 10 + 7
= 17
Answer(s): 17
