Yoko spent
45 of her money on 14 staplers and 5 pencils. The cost of each pencil is 2 times the cost of each stapler. She bought some more staplers with
12 of her remaining money. How many staplers did Yoko buy altogether?
| 14 staplers + 5 pencils |
Remaining
amount |
Total
amount |
| 4 p = 24 u |
1 p = 6 u |
5 p |
14
staplers |
5
pencils |
More staplers |
Left |
|
| |
|
1 |
1 |
|
| 14 u |
10 u |
3 u |
|
|
Cost of 1 stapler = 1 u
Cost of 1 pencil = 2 u
Cost of 14 staplers = 14 x 1 u = 14 u
Cost of 5 pencils = 5 x 2 u = 10 u
Cost of 14 staplers + 5 pencils
= 14 u + 10 u
= 24 u
4 p = 24 u
1 p = 24 u ÷ 4 = 6 u
Amount of remaining money that Yoko spent on buying more staplers
=
12 x 6 u
= 3 u
Number of staplers that Yoko bought with
12 of her remaining money
= 3 u ÷ 1 u
= 3
Total number of staplers that Yoko bought
= 14 + 3
= 17
Answer(s): 17
