The file cost thrice as much as the notebook. Howard bought 1 file and 5 notebooks for $16.
- How much did one notebook cost?
- How much did one file cost?
(a)
Cost of the notebook = 1 u
Cost of 5 notebooks = 5 x 1 u = 5 u
Cost of the file = 3 x 1 u = 3 u
Total cost = 5 u + 3 u = 8 u
8 u = 16
1 u = 16 ÷ 8 = 2
Cost of 1 notebook
= 1 u
= $2
(b)
Cost of 1 file
= 3 u
= 3 x 2
= $6
Answer(s): (a) $2; (b)$6