A notebook cost $3.50. A pencil cost $15.50 more than the notebook. Eva spent $66 on such notebooks and pencils. She bought four times as many notebooks as pencils.
- How many pencils did Eva buy?
- How much money did Eva spend on the notebooks?
|
Notebooks |
Pencils |
Total |
Number |
4 u |
1 u |
|
Value |
3.50 |
19 |
|
Total value |
14 u |
19 u |
66 |
(a)
Cost of a pencil
= 15.50 + 3.50
= $19
Total cost of notebooks and pencils
= 14 u + 19 u
= 33 u
33 u = 66
1 u = 66 ÷ 33 = 2
Number of pencils that Eva bought
= 1 u
= 2
(b)
Amount that Eva spent on notebooks
= 14 u
= 14 x 2
= $28
Answer(s): (a) 2; (b) $28