A pencil cost $1.50. A file cost $12.50 more than the pencil. Linda spent $160 on such pencils and files. She bought four times as many pencils as files.
- How many files did Linda buy?
- How much money did Linda spend on the pencils?
|
Pencils |
Files |
Total |
Number |
4 u |
1 u |
|
Value |
1.50 |
14 |
|
Total value |
6 u |
14 u |
160 |
(a)
Cost of a file
= 12.50 + 1.50
= $14
Total cost of pencils and files
= 6 u + 14 u
= 20 u
20 u = 160
1 u = 160 ÷ 20 = 8
Number of files that Linda bought
= 1 u
= 8
(b)
Amount that Linda spent on pencils
= 6 u
= 6 x 8
= $48
Answer(s): (a) 8; (b) $48