A file cost $2.50. A stapler cost $12.50 more than the file. Gwen spent $120 on such files and staplers. She bought twice as many files as staplers.
- How many staplers did Gwen buy?
- How much money did Gwen spend on the files?
|
Files |
Staplers |
Total |
Number |
2 u |
1 u |
|
Value |
2.50 |
15 |
|
Total value |
5 u |
15 u |
120 |
(a)
Cost of a stapler
= 12.50 + 2.50
= $15
Total cost of files and staplers
= 5 u + 15 u
= 20 u
20 u = 120
1 u = 120 ÷ 20 = 6
Number of staplers that Gwen bought
= 1 u
= 6
(b)
Amount that Gwen spent on files
= 5 u
= 5 x 6
= $30
Answer(s): (a) 6; (b) $30