5 dishwashers and 2 laptops cost a total of $3024. Each dishwasher costs twice as much as each laptop.
- What is the cost of each dishwasher?
- What is the total cost of 1 dishwasher and 1 laptop?
(a)
Cost of 1 laptop = 1 u
Cost of 1 dishwasher = 2 x 1 u = 2 u
Cost of 2 laptops = 2 x 1 u = 2 u
Cost of 5 dishwashers = 5 x 2 u = 10 u
Total cost of 5 dishwashers and 2 laptops
= 10 u + 2 u
= 12 u
12 u = 3024
1 u = 3024 ÷ 12 = 252
Cost of each dishwasher
= 2 u
= 2 x 252
= $504
(b)
Total cost of 1 dishwasher and 1 laptop
= 2 u + 1 u
= 3 u
= 3 x 252
= $756
Answer(s): (a) $504; (b) $756
