3 dishwashers and 2 washing machines cost a total of $1749. 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 2 washing machines = 2 x 1 u = 2 u
Cost of 3 dishwashers = 3 x 3 u = 9 u
Total cost of 3 dishwashers and 2 washing machines
= 9 u + 2 u
= 11 u
11 u = 1749
1 u = 1749 ÷ 11 = 159
Cost of each dishwasher
= 3 u
= 3 x 159
= $477
(b)
Total cost of 1 dishwasher and 1 washing machine
= 3 u + 1 u
= 4 u
= 4 x 159
= $636
Answer(s): (a) $477; (b) $636
