If Adam buys 5 stickers and 6 beads, it costs $69.80.
If Adam buys 6 stickers and 5 beads, he will have $3.20 left.

1. Find the cost of 1 sticker and 1 bead.
2. Find the cost of 1 sticker.
3. Find the cost of 1 bead.

(a)
5 stickers + 6 beads = 69.80 --- (1)
6 stickers + 5 beads = 69.80 - 3.20 = 66.60 --- (2)

(1) + (2)
11 stickers + 11 beads = 136.40 --- (3)

(3) _{÷ 11}
1 sticker + 1 bead = 136.40 ÷ 11 = 12.40 --- (4)

Cost of 1 sticker and 1 bead = $12.40

(b)
(4) _{x 5}
5 stickers + 5 beads = 5 x 12.40 = 620 --- (5)

(2) - (5)
6 stickers + 5 beads - 5 stickers - 5 beads = 66.60 - 620
6 stickers - 5 stickers - 5 beads + 5 beads = 4.60
1 sticker = 4.60

Cost of 1 sticker = $4.60

(c)
Substitute 1 sticker = 4.60 into (4).

1 sticker + 1 bead = 12.40
4.60 + 1 bead = 12.40
1 bead = 12.40 - 4.60 = 7.80

Cost of 1 bead = $7.80

Answer(s): (a) $12.40; (b) $4.60; (c) $7.80