A file cost $1.50. A pen cost $13.50 more than the file. Elyse spent $84 on such files and pens. She bought four times as many files as pens.
- How many pens did Elyse buy?
- How much money did Elyse spend on the files?
|
Files |
Pens |
Total |
Number |
4 u |
1 u |
|
Value |
1.50 |
15 |
|
Total value |
6 u |
15 u |
84 |
(a)
Cost of a pen
= 13.50 + 1.50
= $15
Total cost of files and pens
= 6 u + 15 u
= 21 u
21 u = 84
1 u = 84 ÷ 21 = 4
Number of pens that Elyse bought
= 1 u
= 4
(b)
Amount that Elyse spent on files
= 6 u
= 6 x 4
= $24
Answer(s): (a) 4; (b) $24