In a store, the number of glues was
47 of the total number of glues and folders together. Bryan sold the glues and folders in sets of 3 glues and 10 folders. After selling all the folders, he still had 279 glues left. How many folders were in the store were sold?
| |
Glues |
Folders |
| Before |
4x10 =
40 u |
3x10 =
30 u |
| Change |
- 3x3 =
- 9 u |
- 10x3 =
- 30 u |
| After |
279 |
0 |
Since all the folders were sold, the number of folders at first and the number of folders sold were the same. Make the number of folders at first and sold the same. LCM of 3 and 10 is 30.
Number of glues sold
= 40 u - 9 u
= 31 u
31 u = 279
1 u = 279 ÷ 31 = 9
Number of folders were sold
= 30 u
= 30 x 9
= 270
Answer(s): 270
