Adam spends $8 for 1 marble and 1 sticker.
The cost of 1 marble is
17 the cost of 1 sticker.
- How much is the sticker?
- How much is the marble less than the sticker?
(a)
Cost of the marble = 1 u
Cost of the sticker = 7 u
Total cost of the marble and the sticker
= 1 u + 7 u
= 8 u
8 u = 8
1 u = 8 ÷ 8 = 1
Cost of the sticker
= 7 u
= 7 x 1
= $7
(b)
Cost of the marble less than the sticker
= 7 u - 1 u
= 6 u
= 6 x 1
= $6
Answer(s): (a) $7; (b) $6