A stapler cost $1.50. A file cost $13.50 more than the stapler. Xylia spent $144 on such staplers and files. She bought twice as many staplers as files.
- How many files did Xylia buy?
- How much money did Xylia spend on the staplers?
|
Staplers |
Files |
Total |
Number |
2 u |
1 u |
|
Value |
1.50 |
15 |
|
Total value |
3 u |
15 u |
144 |
(a)
Cost of a file
= 13.50 + 1.50
= $15
Total cost of staplers and files
= 3 u + 15 u
= 18 u
18 u = 144
1 u = 144 ÷ 18 = 8
Number of files that Xylia bought
= 1 u
= 8
(b)
Amount that Xylia spent on staplers
= 3 u
= 3 x 8
= $24
Answer(s): (a) 8; (b) $24