At a shop, Pamela paid $20 for 1 button and 9 stickers. The button cost $10 more than each sticker.
- How much is 1 sticker?
- How much is 1 button?
(a)
Cost of 1 sticker = 1 u
Cost of 9 stickers = 9 u
Cost of 1 button = 1 u + 10
Total cost of 1 button and 9 stickers
= 9 u + 1 u + 10
= 10 u + 10
10 u + 10 = 20
10 u = 20 - 10
10 u = 10
1 u = 10 ÷ 10 = 1
Cost of 1 sticker
= 1 u
= $1
(b)
Cost of 1 button
= 1 u + 10
= 1 + 10
= $11
Answer(s): (a) $1; (b) $11