At a shop, Xuan paid $44 for 1 stamp and 7 beads. The stamp cost $4 more than each bead.
- How much is 1 bead?
- How much is 1 stamp?
(a)
Cost of 1 bead = 1 u
Cost of 7 beads = 7 u
Cost of 1 stamp = 1 u + 4
Total cost of 1 stamp and 7 beads
= 7 u + 1 u + 4
= 8 u + 4
8 u + 4 = 44
8 u = 44 - 4
8 u = 40
1 u = 40 ÷ 8 = 5
Cost of 1 bead
= 1 u
= $5
(b)
Cost of 1 stamp
= 1 u + 4
= 5 + 4
= $9
Answer(s): (a) $5; (b) $9