A pen cost $3.50. A marker cost $14.50 more than the pen. Gwen spent $200 on such pens and markers. She bought twice as many pens as markers.
- How many markers did Gwen buy?
- How much money did Gwen spend on the pens?
|
Pens |
Markers |
Total |
Number |
2 u |
1 u |
|
Value |
3.50 |
18 |
|
Total value |
7 u |
18 u |
200 |
(a)
Cost of a marker
= 14.50 + 3.50
= $18
Total cost of pens and markers
= 7 u + 18 u
= 25 u
25 u = 200
1 u = 200 ÷ 25 = 8
Number of markers that Gwen bought
= 1 u
= 8
(b)
Amount that Gwen spent on pens
= 7 u
= 7 x 8
= $56
Answer(s): (a) 8; (b) $56