Adam pays $22 for 2 stickers and 4 beads.
4 stickers cost as much as 3 beads.
- How much is 1 sticker?
- How much is 1 bead?
- How much is 2 beads and 4 stickers?
(a)
LCM of 4 and 3 = 12
Cost of 4 stickers = 12 u
Cost of 1 sticker = 12 u ÷ 4 = 3 u
Cost of 3 beads = 12 u
Cost of 1 bead = 12 u ÷ 3 = 4 u
Cost of 2 stickers = 2 x 3 u = 6 u
Cost of 4 beads = 4 x 4 u = 16 u
Total cost of 2 stickers and 4 beads
= 6 u + 16 u
= 22 u
22 u = 22
1 u = 22 ÷ 22 = 1
Cost of 1 sticker
= 3 u
= 3 x 1
= $3
(b)
Cost of 1 bead
= 4 u
= 4 x 1
= $4
(c)
Cost of 2 beads and 4 stickers
= 2 x 4 u + 4 x 3 u
= 8 u + 12 u
= 20 u
= 20 x 1
= $20
Answer(s): (a) $3; (b) $4; (c) $20