2 washing machines and 4 laptops cost a total of $864. Each washing machine costs twice as much as each laptop.
- What is the cost of each washing machine?
- What is the total cost of 1 washing machine and 1 laptop?
(a)
Cost of 1 laptop = 1 u
Cost of 1 washing machine = 2 x 1 u = 2 u
Cost of 4 laptops = 4 x 1 u = 4 u
Cost of 2 washing machines = 2 x 2 u = 4 u
Total cost of 2 washing machines and 4 laptops
= 4 u + 4 u
= 8 u
8 u = 864
1 u = 864 ÷ 8 = 108
Cost of each washing machine
= 2 u
= 2 x 108
= $216
(b)
Total cost of 1 washing machine and 1 laptop
= 2 u + 1 u
= 3 u
= 3 x 108
= $324
Answer(s): (a) $216; (b) $324
