2 washing machines and 3 refrigerators cost a total of $2100. Each washing machine costs twice as much as each refrigerator.
- What is the cost of each washing machine?
- What is the total cost of 1 washing machine and 1 refrigerator?
(a)
Cost of 1 refrigerator = 1 u
Cost of 1 washing machine = 2 x 1 u = 2 u
Cost of 3 refrigerators = 3 x 1 u = 3 u
Cost of 2 washing machines = 2 x 2 u = 4 u
Total cost of 2 washing machines and 3 refrigerators
= 4 u + 3 u
= 7 u
7 u = 2100
1 u = 2100 ÷ 7 = 300
Cost of each washing machine
= 2 u
= 2 x 300
= $600
(b)
Total cost of 1 washing machine and 1 refrigerator
= 2 u + 1 u
= 3 u
= 3 x 300
= $900
Answer(s): (a) $600; (b) $900