At a shop, Nora paid $16 for 1 eraser and 5 buttons. The eraser cost $4 more than each button.
- How much is 1 button?
- How much is 1 eraser?
(a)
Cost of 1 button = 1 u
Cost of 5 buttons = 5 u
Cost of 1 eraser = 1 u + 4
Total cost of 1 eraser and 5 buttons
= 5 u + 1 u + 4
= 6 u + 4
6 u + 4 = 16
6 u = 16 - 4
6 u = 12
1 u = 12 ÷ 6 = 2
Cost of 1 button
= 1 u
= $2
(b)
Cost of 1 eraser
= 1 u + 4
= 2 + 4
= $6
Answer(s): (a) $2; (b) $6