2 dishwashers and 4 notebooks cost a total of $2220. Each dishwasher costs thrice as much as each notebook.
- What is the cost of each dishwasher?
- What is the total cost of 1 dishwasher and 1 notebook?
(a)
Cost of 1 notebook = 1 u
Cost of 1 dishwasher = 3 x 1 u = 3 u
Cost of 4 notebooks = 4 x 1 u = 4 u
Cost of 2 dishwashers = 2 x 3 u = 6 u
Total cost of 2 dishwashers and 4 notebooks
= 6 u + 4 u
= 10 u
10 u = 2220
1 u = 2220 ÷ 10 = 222
Cost of each dishwasher
= 3 u
= 3 x 222
= $666
(b)
Total cost of 1 dishwasher and 1 notebook
= 3 u + 1 u
= 4 u
= 4 x 222
= $888
Answer(s): (a) $666; (b) $888