Last week, Wesley had a total of 66 silver and yellow files. Two weeks later, he sold
23 of all the silver files and 6 yellow files. Now he has the same number of silver and yellow files. How many files does he have in the end?
| |
Silver |
Yellow |
Total |
| Before |
3 u |
1 u + 6 |
4 u + 6 |
| Change |
- 2 u |
- 6 |
|
| After |
1 u |
1 u |
|
Comparing the silver
and yellow files in the end |
1 |
1 |
|
Total number of files at first
= 3 u + 1 u + 6
= 4 u + 6
4 u + 6 = 66
4 u = 66 - 6
4 u = 60
1 u = 60 ÷ 4 = 15
Number of files that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 15
= 30
Answer(s): 30
