A pen cost $3.50. A stapler cost $12.50 more than the pen. Jane spent $115 on such pens and staplers. She bought twice as many pens as staplers.
- How many staplers did Jane buy?
- How much money did Jane spend on the pens?
|
Pens |
Staplers |
Total |
Number |
2 u |
1 u |
|
Value |
3.50 |
16 |
|
Total value |
7 u |
16 u |
115 |
(a)
Cost of a stapler
= 12.50 + 3.50
= $16
Total cost of pens and staplers
= 7 u + 16 u
= 23 u
23 u = 115
1 u = 115 ÷ 23 = 5
Number of staplers that Jane bought
= 1 u
= 5
(b)
Amount that Jane spent on pens
= 7 u
= 7 x 5
= $35
Answer(s): (a) 5; (b) $35