The file cost five times as much as the marker. Glen bought 1 file and 4 markers for $18.
- How much did one marker cost?
- How much did one file cost?
(a)
Cost of the marker = 1 u
Cost of 4 markers = 4 x 1 u = 4 u
Cost of the file = 5 x 1 u = 5 u
Total cost = 4 u + 5 u = 9 u
9 u = 18
1 u = 18 ÷ 9 = 2
Cost of 1 marker
= 1 u
= $2
(b)
Cost of 1 file
= 5 u
= 5 x 2
= $10
Answer(s): (a) $2; (b)$10