At a shop, Shannon paid $79 for 1 eraser and 6 buttons. The eraser cost $2 more than each button.
- How much is 1 button?
- How much is 1 eraser?
(a)
Cost of 1 button = 1 u
Cost of 6 buttons = 6 u
Cost of 1 eraser = 1 u + 2
Total cost of 1 eraser and 6 buttons
= 6 u + 1 u + 2
= 7 u + 2
7 u + 2 = 79
7 u = 79 - 2
7 u = 77
1 u = 77 ÷ 7 = 11
Cost of 1 button
= 1 u
= $11
(b)
Cost of 1 eraser
= 1 u + 2
= 11 + 2
= $13
Answer(s): (a) $11; (b) $13