Marion spent
34 of her money on 14 pens and 5 staplers. The cost of each stapler is 2 times the cost of each pen. She bought some more pens with
12 of her remaining money. How many pens did Marion buy altogether?
14 pens + 5 staplers |
Remaining amount |
Total amount |
3 p = 24 u |
1 p = 8 u |
4 p |
14 pens |
5 staplers |
More pens |
Left |
|
|
|
1 |
1 |
|
14 u |
10 u |
4 u |
|
|
Cost of 1 pen = 1 u
Cost of 1 stapler = 2 u
Cost of 14 pens = 14 x 1 u = 14 u
Cost of 5 staplers = 5 x 2 u = 10 u
Cost of 14 pens + 5 staplers
= 14 u + 10 u
= 24 u
3 p = 24 u
1 p = 24 u ÷ 3 = 8 u
Amount of remaining money that Marion spent on buying more pens
=
12 x 8 u
= 4 u
Number of pens that Marion bought with
12 of her remaining money
= 4 u ÷ 1 u
= 4
Total number of pens that Marion bought
= 14 + 4
= 18
Answer(s): 18