3 washing machines and 5 dishwashers cost a total of $2541. Each washing machine costs twice as much as each dishwasher.
- What is the cost of each washing machine?
- What is the total cost of 1 washing machine and 1 dishwasher?
(a)
Cost of 1 dishwasher = 1 u
Cost of 1 washing machine = 2 x 1 u = 2 u
Cost of 5 dishwashers = 5 x 1 u = 5 u
Cost of 3 washing machines = 3 x 2 u = 6 u
Total cost of 3 washing machines and 5 dishwashers
= 6 u + 5 u
= 11 u
11 u = 2541
1 u = 2541 ÷ 11 = 231
Cost of each washing machine
= 2 u
= 2 x 231
= $462
(b)
Total cost of 1 washing machine and 1 dishwasher
= 2 u + 1 u
= 3 u
= 3 x 231
= $693
Answer(s): (a) $462; (b) $693
