1 bead and 1 marble cost $15.
1 sticker and 1 bead cost $9.
1 sticker and 1 marble cost $18.
- How much is 1 sticker?
- How much is 1 marble?
- How much is 1 bead?
Cost of 2 beads, 2 marbles and 2 stickers
= 15 + 9 + 18
= $42
Cost of 1 bead, 1 marble and 1 sticker
= 42 ÷ 2
= $21
(a)
Cost of 1 sticker
= 21 - 15
= $6
(b)
Cost of 1 marble
= 21 - 9
= $12
(c)
Cost of 1 bead
= 21 - 18
= $3
Answer(s): (a) $6; (b) $12; (c) $3