Linda spent
23 of her money on 12 pens and 5 staplers. The cost of each stapler is 4 times the cost of each pen. She bought some more pens with
78 of her remaining money. How many pens did Linda buy altogether?
| 12 pens + 5 staplers |
Remaining
amount |
Total
amount |
| 2 p = 32 u |
1 p = 16 u |
3 p |
12
pens |
5
staplers |
More pens |
Left |
|
| |
|
7 |
1 |
|
| 12 u |
20 u |
14 u |
|
|
Cost of 1 pen = 1 u
Cost of 1 stapler = 4 u
Cost of 12 pens = 12 x 1 u = 12 u
Cost of 5 staplers = 5 x 4 u = 20 u
Cost of 12 pens + 5 staplers
= 12 u + 20 u
= 32 u
2 p = 32 u
1 p = 32 u ÷ 2 = 16 u
Amount of remaining money that Linda spent on buying more pens
=
78 x 16 u
= 14 u
Number of pens that Linda bought with
78 of her remaining money
= 14 u ÷ 1 u
= 14
Total number of pens that Linda bought
= 12 + 14
= 26
Answer(s): 26
