The total cost of the computer, the toaster and the blender is $720. The blender costs twice as much as the toaster. The computer costs thrice as much as the total price of the blender and toaster. How much less does the blender cost than the computer?
| Blender |
Toaster |
Computer |
| 2 u |
1 u |
|
| 3 u |
9 u |
| 2 u |
1 u |
9 u |
Cost of the toaster = 1 u
Cost of the blender = 2 u
Total cost of the toaster and the blender
= 1 u + 2 u
= 3 u
Cost of the computer
= 3 x 3 u
= 9 u
Total cost of the blender, the toaster and computer
= 9 u + 1 u + 2 u
= 12 u
12 u = 720
1 u = 720 ÷ 12 = 60
Amount that the blender cost less than the computer
= 9 u - 2 u
= 7 u
= 7 x 60
= $420
Answer(s): $420
