At a shop, Jean paid $77 for 1 button and 5 coins. The button cost $5 more than each coin.
- How much is 1 coin?
- How much is 1 button?
(a)
Cost of 1 coin = 1 u
Cost of 5 coins = 5 u
Cost of 1 button = 1 u + 5
Total cost of 1 button and 5 coins
= 5 u + 1 u + 5
= 6 u + 5
6 u + 5 = 77
6 u = 77 - 5
6 u = 72
1 u = 72 ÷ 6 = 12
Cost of 1 coin
= 1 u
= $12
(b)
Cost of 1 button
= 1 u + 5
= 12 + 5
= $17
Answer(s): (a) $12; (b) $17