A pencil cost $1.50. A file cost $14.50 more than the pencil. Min spent $152 on such pencils and files. She bought twice as many pencils as files.
- How many files did Min buy?
- How much money did Min spend on the pencils?
|
Pencils |
Files |
Total |
Number |
2 u |
1 u |
|
Value |
1.50 |
16 |
|
Total value |
3 u |
16 u |
152 |
(a)
Cost of a file
= 14.50 + 1.50
= $16
Total cost of pencils and files
= 3 u + 16 u
= 19 u
19 u = 152
1 u = 152 ÷ 19 = 8
Number of files that Min bought
= 1 u
= 8
(b)
Amount that Min spent on pencils
= 3 u
= 3 x 8
= $24
Answer(s): (a) 8; (b) $24