2 notebooks and 5 computers cost a total of $1188. Each notebook costs twice as much as each computer.
- What is the cost of each notebook?
- What is the total cost of 1 notebook and 1 computer?
(a)
Cost of 1 computer = 1 u
Cost of 1 notebook = 2 x 1 u = 2 u
Cost of 5 computers = 5 x 1 u = 5 u
Cost of 2 notebooks = 2 x 2 u = 4 u
Total cost of 2 notebooks and 5 computers
= 4 u + 5 u
= 9 u
9 u = 1188
1 u = 1188 ÷ 9 = 132
Cost of each notebook
= 2 u
= 2 x 132
= $264
(b)
Total cost of 1 notebook and 1 computer
= 2 u + 1 u
= 3 u
= 3 x 132
= $396
Answer(s): (a) $264; (b) $396
