A notebook cost $2.50. A pen cost $13.50 more than the notebook. Pamela spent $63 on such notebooks and pens. She bought twice as many notebooks as pens.
- How many pens did Pamela buy?
- How much money did Pamela spend on the notebooks?
|
Notebooks |
Pens |
Total |
Number |
2 u |
1 u |
|
Value |
2.50 |
16 |
|
Total value |
5 u |
16 u |
63 |
(a)
Cost of a pen
= 13.50 + 2.50
= $16
Total cost of notebooks and pens
= 5 u + 16 u
= 21 u
21 u = 63
1 u = 63 ÷ 21 = 3
Number of pens that Pamela bought
= 1 u
= 3
(b)
Amount that Pamela spent on notebooks
= 5 u
= 5 x 3
= $15
Answer(s): (a) 3; (b) $15