4 stickers and 1 bead cost $10.60.
1 sticker and 4 beads cost $7.90.

1. Find the cost of 1 sticker and 1 bead.
2. Find the cost of 1 bead.
3. Find the cost of 1 sticker.
4. Find the cost of 5 stickers and 5 beads.

(a)
4 stickers + 1 bead = 10.60 --- (1)
1 sticker + 4 beads = 7.90 --- (2)

(1) + (2)
5 stickers + 5 beads = 10.60 + 7.90
5 stickers + 5 beads = 18.50 --- (3)

(3) _{÷ 5}
5 stickers + 5 beads = 18.50
1 sticker + 1 bead = 18.50 ÷ 5
1 sticker + 1 bead = 3.70 --- (4)

(b)
(2) - (4)
(1 sticker + 4 beads) - (1 sticker + 1 marble) = 7.90 - 3.70
1 sticker - 1 sticker + 4 beads - 1 bead = 4.20
3 beads = 4.20
1 bead = 4.20 ÷ 3 = 1.40

Cost of 1 bead = $1.40

(c)
Substitute 1 bead = 1.40 into (4).
1 sticker + 1 bead = 3.70
1 sticker + 1.40 = 3.70
1 sticker = 3.70 - 1.40 = 2.30

Cost of 1 sticker = $2.30

(d)
(4) _{x 5}
1 sticker + 1 bead = 3.70
5 x (1 sticker + 1 marble) = 5 x 3.70
5 stickers + 5 beads = 18.50

Cost of 5 stickers and 5 beads = $18.50

Answer(s): (a) $3.70; (b) $1.40; (c) $2.30; (d) $18.50