Wesley put all his stamps into 21 large albums and 12 small albums. Each large album can hold 18 more stamps than each small album.
13 of his stamps were put into all the small albums and the rest were put into the large albums. How many stamps can be put into one small album?
| |
Large albums
(1) |
Small albums
(2) |
| Number |
21 |
12 |
| Value |
1 u + 18 |
1 u |
| Total value |
21 u + 378 |
12 u |
Comparing total stickers in
large albums and
small albums |
2 p |
1 p |
Total number of stamps in large albums
= 21 x (1 u + 18)
= 21 u + 378
21 u + 378 =
2 p --- (1)
12 u = 1 p --- (2)
(2)
x2
24 u =
2 p --- (3)
(3) = (1)
24 u = 21 u + 378
24 u - 21 u = 378
3 u = 378
1 u = 378 ÷ 3 = 126
Number of stamps in one small album
= 1 u
= 126
Answer(s): 126
