2 portable air-conditioners and 4 laptops cost a total of $2072. Each portable air-conditioner costs twice as much as each laptop.
- What is the cost of each portable air-conditioner?
- What is the total cost of 1 portable air-conditioner and 1 laptop?
(a)
Cost of 1 laptop = 1 u
Cost of 1 portable air-conditioner = 2 x 1 u = 2 u
Cost of 4 laptops = 4 x 1 u = 4 u
Cost of 2 portable air-conditioners = 2 x 2 u = 4 u
Total cost of 2 portable air-conditioners and 4 laptops
= 4 u + 4 u
= 8 u
8 u = 2072
1 u = 2072 ÷ 8 = 259
Cost of each portable air-conditioner
= 2 u
= 2 x 259
= $518
(b)
Total cost of 1 portable air-conditioner and 1 laptop
= 2 u + 1 u
= 3 u
= 3 x 259
= $777
Answer(s): (a) $518; (b) $777
