In a stationery kiosk, 2 staplers and 3 markers cost $18.40. Joseph bought 3 staplers and 4 markers at $25.80 from the book shop.
- Find the cost of 1 stapler and 1 marker.
- What was the cost of 1 marker?
(a)
Let 1 stapler be 1 S.
Let 1 marker be 1 M.
2 S + 3 M = 18.40 --- (1)
3 S + 4 M = 25.80 --- (2)
(2) - (1)
1 S + 1 M = 25.80 --- 18.40
1 S + 1 M = 7.40 --- (3)
Cost of 1 stapler and 1 marker = $7.40
(b)
(3)
x2 2 S + 2 M = 14.80 --- (4)
(1) - (4)
1 M = 18.40 - 14.80 = $3.60
Cost of 1 marker = $3.60
Answer(s): (a) $7.40; (b) $3.60