Julie spent
23 of her money on 14 pens and 8 pencils. The cost of each pencil is 2 times the cost of each pen. She bought some more pens with
23 of her remaining money. How many pens did Julie buy altogether?
| 14 pens + 8 pencils |
Remaining
amount |
Total
amount |
| 2 p = 30 u |
1 p = 15 u |
3 p |
14
pens |
8
pencils |
More pens |
Left |
|
| |
|
2 |
1 |
|
| 14 u |
16 u |
10 u |
|
|
Cost of 1 pen = 1 u
Cost of 1 pencil = 2 u
Cost of 14 pens = 14 x 1 u = 14 u
Cost of 8 pencils = 8 x 2 u = 16 u
Cost of 14 pens + 8 pencils
= 14 u + 16 u
= 30 u
2 p = 30 u
1 p = 30 u ÷ 2 = 15 u
Amount of remaining money that Julie spent on buying more pens
=
23 x 15 u
= 10 u
Number of pens that Julie bought with
23 of her remaining money
= 10 u ÷ 1 u
= 10
Total number of pens that Julie bought
= 14 + 10
= 24
Answer(s): 24
