2 notebooks and 4 laptops cost a total of $1236. Each notebook costs four times as much as each laptop.
- What is the cost of each notebook?
- What is the total cost of 1 notebook and 1 laptop?
(a)
Cost of 1 laptop = 1 u
Cost of 1 notebook = 4 x 1 u = 4 u
Cost of 4 laptops = 4 x 1 u = 4 u
Cost of 2 notebooks = 2 x 4 u = 8 u
Total cost of 2 notebooks and 4 laptops
= 8 u + 4 u
= 12 u
12 u = 1236
1 u = 1236 ÷ 12 = 103
Cost of each notebook
= 4 u
= 4 x 103
= $412
(b)
Total cost of 1 notebook and 1 laptop
= 4 u + 1 u
= 5 u
= 5 x 103
= $515
Answer(s): (a) $412; (b) $515
