A pen cost $3.50. A notebook cost $12.50 more than the pen. Tammy spent $207 on such pens and notebooks. She bought twice as many pens as notebooks.
- How many notebooks did Tammy buy?
- How much money did Tammy spend on the pens?
|
Pens |
Notebooks |
Total |
Number |
2 u |
1 u |
|
Value |
3.50 |
16 |
|
Total value |
7 u |
16 u |
207 |
(a)
Cost of a notebook
= 12.50 + 3.50
= $16
Total cost of pens and notebooks
= 7 u + 16 u
= 23 u
23 u = 207
1 u = 207 ÷ 23 = 9
Number of notebooks that Tammy bought
= 1 u
= 9
(b)
Amount that Tammy spent on pens
= 7 u
= 7 x 9
= $63
Answer(s): (a) 9; (b) $63