Roshel spent
45 of her money on 10 staplers and 5 markers. The cost of each marker is 2 times the cost of each stapler. She bought some more staplers with
45 of her remaining money. How many staplers did Roshel buy altogether?
| 10 staplers + 5 markers |
Remaining
amount |
Total
amount |
| 4 p = 20 u |
1 p = 5 u |
5 p |
10
staplers |
5
markers |
More staplers |
Left |
|
| |
|
4 |
1 |
|
| 10 u |
10 u |
4 u |
|
|
Cost of 1 stapler = 1 u
Cost of 1 marker = 2 u
Cost of 10 staplers = 10 x 1 u = 10 u
Cost of 5 markers = 5 x 2 u = 10 u
Cost of 10 staplers + 5 markers
= 10 u + 10 u
= 20 u
4 p = 20 u
1 p = 20 u ÷ 4 = 5 u
Amount of remaining money that Roshel spent on buying more staplers
=
45 x 5 u
= 4 u
Number of staplers that Roshel bought with
45 of her remaining money
= 4 u ÷ 1 u
= 4
Total number of staplers that Roshel bought
= 10 + 4
= 14
Answer(s): 14
