The total cost of the dishwasher, the toaster and the water heater is $900. The water heater costs four times as much as the toaster. The dishwasher costs twice as much as the total price of the water heater and toaster. How much less does the water heater cost than the dishwasher?
| Water Heater |
Toaster |
Dishwasher |
| 4 u |
1 u |
|
| 5 u |
10 u |
| 4 u |
1 u |
10 u |
Cost of the toaster = 1 u
Cost of the water heater = 4 u
Total cost of the toaster and the water heater
= 1 u + 4 u
= 5 u
Cost of the dishwasher
= 2 x 5 u
= 10 u
Total cost of the water heater, the toaster and dishwasher
= 10 u + 1 u + 4 u
= 15 u
15 u = 900
1 u = 900 ÷ 15 = 60
Amount that the water heater cost less than the dishwasher
= 10 u - 4 u
= 6 u
= 6 x 60
= $360
Answer(s): $360
