3 portable air-conditioners and 2 computers cost a total of $2717. Each portable air-conditioner costs thrice as much as each computer.
- What is the cost of each portable air-conditioner?
- What is the total cost of 1 portable air-conditioner and 1 computer?
(a)
Cost of 1 computer = 1 u
Cost of 1 portable air-conditioner = 3 x 1 u = 3 u
Cost of 2 computers = 2 x 1 u = 2 u
Cost of 3 portable air-conditioners = 3 x 3 u = 9 u
Total cost of 3 portable air-conditioners and 2 computers
= 9 u + 2 u
= 11 u
11 u = 2717
1 u = 2717 ÷ 11 = 247
Cost of each portable air-conditioner
= 3 u
= 3 x 247
= $741
(b)
Total cost of 1 portable air-conditioner and 1 computer
= 3 u + 1 u
= 4 u
= 4 x 247
= $988
Answer(s): (a) $741; (b) $988
