The notebook cost thrice as much as the stapler. Harry bought 1 notebook and 2 staplers for $15.
- How much did one stapler cost?
- How much did one notebook cost?
(a)
Cost of the stapler = 1 u
Cost of 2 staplers = 2 x 1 u = 2 u
Cost of the notebook = 3 x 1 u = 3 u
Total cost = 2 u + 3 u = 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Cost of 1 stapler
= 1 u
= $3
(b)
Cost of 1 notebook
= 3 u
= 3 x 3
= $9
Answer(s): (a) $3; (b)$9