Adam pays $14.20 for 4 stickers and 2 beads.
A sticker costs $3.40 more than 1 bead.
What is the cost of 2 stickers and 3 beads?
Choose the cheaper item to be 1 u.
1 sticker costs $3.40 more than 1 bead.
The cheaper item is the bead.

Cost of the bead = 1 u
Cost of the sticker = 1 u + 3.40

Cost of 4 stickers = 4 x (1 u + 3.40) = 4 u + 13.60
Cost of 2 beads = 2 u

Total cost of 4 stickers and 2 beads
= 4 u + 13.60 + 2 u
= 4 u + 2 u + 13.60
= 6 u + 13.60

6 u + 13.60 = 14.20
6 u = 14.20 - 13.60
6 u = 0.60

1 u = 0.60 ÷ 6 = 0.10

Cost of 2 stickers and 3 beads
= 2 x (1 u + 3.40) + 3 u
= 2 u + 6.80 + 3 u
= 2 u + 3 u + 6.80
= 5 u + 6.80
= 5 x 0.10 + 6.80
= 0.50 + 6.80
= $7.30

Answer(s): $7.30