Some stickers are packed into exactly packets of 6.
If the stickers are repacked into packets of 12,
there are 4 less packets.
- How many packets are there?
- How many stickers are there?
|
Packets of 6 |
Packets of 12 |
Number |
1 u |
1 u - 4 |
Value |
6 |
12 |
Total value |
6 u |
12(1 u - 4) = 12 u - 48 |
(a)
Let the number of packets of 6 be 1 u.
Number of stickers in packets of 6
= 1 u x 6
= 6 u
Number of stickers in packets of 12
= 12 x (1 u - 4)
= 12 u - 48
6 u = 12 u - 48
12 u - 6 u = 48
6 u = 48
1 u = 48 ÷ 6 = 8
Number of packets of 6 = 8
(b)
Number of stickers
= 6 u
= 6 x 8
= 48
Answer(s): (a) 8; (b) 48