5 computers and 2 notebooks cost a total of $2256. Each computer costs twice as much as each notebook.
- What is the cost of each computer?
- What is the total cost of 1 computer and 1 notebook?
(a)
Cost of 1 notebook = 1 u
Cost of 1 computer = 2 x 1 u = 2 u
Cost of 2 notebooks = 2 x 1 u = 2 u
Cost of 5 computers = 5 x 2 u = 10 u
Total cost of 5 computers and 2 notebooks
= 10 u + 2 u
= 12 u
12 u = 2256
1 u = 2256 ÷ 12 = 188
Cost of each computer
= 2 u
= 2 x 188
= $376
(b)
Total cost of 1 computer and 1 notebook
= 2 u + 1 u
= 3 u
= 3 x 188
= $564
Answer(s): (a) $376; (b) $564
