1 sticker and 1 bead cost $10.
1 marble and 1 sticker cost $9.
1 marble and 1 bead cost $17.
- How much is 1 marble?
- How much is 1 bead?
- How much is 1 sticker?
Cost of 2 stickers, 2 beads and 2 marbles
= 10 + 9 + 17
= $36
Cost of 1 sticker, 1 bead and 1 marble
= 36 ÷ 2
= $18
(a)
Cost of 1 marble
= 18 - 10
= $8
(b)
Cost of 1 bead
= 18 - 9
= $9
(c)
Cost of 1 sticker
= 18 - 17
= $1
Answer(s): (a) $8; (b) $9; (c) $1