2 laptops and 5 washing machines cost a total of $1737. Each laptop costs twice as much as each washing machine.
- What is the cost of each laptop?
- What is the total cost of 1 laptop and 1 washing machine?
(a)
Cost of 1 washing machine = 1 u
Cost of 1 laptop = 2 x 1 u = 2 u
Cost of 5 washing machines = 5 x 1 u = 5 u
Cost of 2 laptops = 2 x 2 u = 4 u
Total cost of 2 laptops and 5 washing machines
= 4 u + 5 u
= 9 u
9 u = 1737
1 u = 1737 ÷ 9 = 193
Cost of each laptop
= 2 u
= 2 x 193
= $386
(b)
Total cost of 1 laptop and 1 washing machine
= 2 u + 1 u
= 3 u
= 3 x 193
= $579
Answer(s): (a) $386; (b) $579