A pen cost $2.50. A notebook cost $12.50 more than the pen. Linda spent $140 on such pens and notebooks. She bought twice as many pens as notebooks.
- How many notebooks did Linda buy?
- How much money did Linda spend on the pens?
|
Pens |
Notebooks |
Total |
Number |
2 u |
1 u |
|
Value |
2.50 |
15 |
|
Total value |
5 u |
15 u |
140 |
(a)
Cost of a notebook
= 12.50 + 2.50
= $15
Total cost of pens and notebooks
= 5 u + 15 u
= 20 u
20 u = 140
1 u = 140 ÷ 20 = 7
Number of notebooks that Linda bought
= 1 u
= 7
(b)
Amount that Linda spent on pens
= 5 u
= 5 x 7
= $35
Answer(s): (a) 7; (b) $35