The marker cost five times as much as the file. Mark bought 1 marker and 3 files for $16.
- How much did one file cost?
- How much did one marker cost?
(a)
Cost of the file = 1 u
Cost of 3 files = 3 x 1 u = 3 u
Cost of the marker = 5 x 1 u = 5 u
Total cost = 3 u + 5 u = 8 u
8 u = 16
1 u = 16 ÷ 8 = 2
Cost of 1 file
= 1 u
= $2
(b)
Cost of 1 marker
= 5 u
= 5 x 2
= $10
Answer(s): (a) $2; (b)$10