Adam spends $10 for 1 sticker and 1 marble.
The cost of 1 sticker is
23 the cost of 1 marble.
- How much is the marble?
- How much is the sticker less than the marble?
(a)
Cost of the sticker = 2 u
Cost of the marble = 3 u
Total cost of the sticker and the marble
= 2 u + 3 u
= 5 u
5 u = 10
1 u = 10 ÷ 5 = 2
Cost of the marble
= 3 u
= 3 x 2
= $6
(b)
Cost of the sticker less than the marble
= 3 u - 2 u
= 1 u
= 1 x 2
= $2
Answer(s): (a) $6; (b) $2