Bryan pays $24 for a sticker and a bead.
The bead costs thrice as much as the sticker.
- Find the cost of the sticker.
- Find the cost of the bead.
- Find the difference in the cost of the bead and the sticker.
(a)
Choose the cheaper item to be 1 u.
The bead costs thrice as much as the sticker.
The sticker is cheaper.
Cost of the sticker = 1 u
Cost of the bead = 3 u
Total cost = 1 u + 3 u = 4 u
4 u = 24
1 u = 24 ÷ 4 = 6
Cost of the sticker
= 1 u
= $6
(b)
Cost of the bead
= 3 u
= 3 x 6
= $18
(c)
Difference in the cost of the bead and the sticker
= 3 u - 1 u
= 2 u
= 2 x 6
= $12
Answer(s): (a) $6; (b) $18; (c) $12