Some stickers are packed into exactly packets of 8.
If the stickers are repacked into packets of 12,
there are 6 less packets.
- How many packets are there?
- How many stickers are there?
|
Packets of 8 |
Packets of 12 |
Number |
1 u |
1 u - 6 |
Value |
8 |
12 |
Total value |
8 u |
12(1 u - 6) = 12 u - 72 |
(a)
Let the number of packets of 8 be 1 u.
Number of stickers in packets of 8
= 1 u x 8
= 8 u
Number of stickers in packets of 12
= 12 x (1 u - 6)
= 12 u - 72
8 u = 12 u - 72
12 u - 8 u = 72
4 u = 72
1 u = 72 ÷ 4 = 18
Number of packets of 8 = 18
(b)
Number of stickers
= 8 u
= 8 x 18
= 144
Answer(s): (a) 18; (b) 144