1 bead and 1 sticker cost $15.
1 marble and 1 bead cost $5.
1 marble and 1 sticker cost $18.
- How much is 1 marble?
- How much is 1 sticker?
- How much is 1 bead?
Cost of 2 beads, 2 stickers and 2 marbles
= 15 + 5 + 18
= $38
Cost of 1 bead, 1 sticker and 1 marble
= 38 ÷ 2
= $19
(a)
Cost of 1 marble
= 19 - 15
= $4
(b)
Cost of 1 sticker
= 19 - 5
= $14
(c)
Cost of 1 bead
= 19 - 18
= $1
Answer(s): (a) $4; (b) $14; (c) $1