The notebook cost four times as much as the marker. Oscar bought 1 notebook and 3 markers for $14.
- How much did one marker cost?
- How much did one notebook cost?
(a)
Cost of the marker = 1 u
Cost of 3 markers = 3 x 1 u = 3 u
Cost of the notebook = 4 x 1 u = 4 u
Total cost = 3 u + 4 u = 7 u
7 u = 14
1 u = 14 ÷ 7 = 2
Cost of 1 marker
= 1 u
= $2
(b)
Cost of 1 notebook
= 4 u
= 4 x 2
= $8
Answer(s): (a) $2; (b)$8