2 dishwashers and 5 washing machines cost a total of $2629. Each dishwasher costs thrice as much as each washing machine.
- What is the cost of each dishwasher?
- What is the total cost of 1 dishwasher and 1 washing machine?
(a)
Cost of 1 washing machine = 1 u
Cost of 1 dishwasher = 3 x 1 u = 3 u
Cost of 5 washing machines = 5 x 1 u = 5 u
Cost of 2 dishwashers = 2 x 3 u = 6 u
Total cost of 2 dishwashers and 5 washing machines
= 6 u + 5 u
= 11 u
11 u = 2629
1 u = 2629 ÷ 11 = 239
Cost of each dishwasher
= 3 u
= 3 x 239
= $717
(b)
Total cost of 1 dishwasher and 1 washing machine
= 3 u + 1 u
= 4 u
= 4 x 239
= $956
Answer(s): (a) $717; (b) $956
