Last week, Lee had a total of 207 brown and yellow files. Two weeks later, he sold
34 of all the brown files and 27 yellow files. Now he has the same number of brown and yellow files. How many files does he have in the end?
| |
Brown |
Yellow |
Total |
| Before |
4 u |
1 u + 27 |
5 u + 27 |
| Change |
- 3 u |
- 27 |
|
| After |
1 u |
1 u |
|
Comparing the brown
and yellow files in the end |
1 |
1 |
|
Total number of files at first
= 4 u + 1 u + 27
= 5 u + 27
5 u + 27 = 207
5 u = 207 - 27
5 u = 180
1 u = 180 ÷ 5 = 36
Number of files that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 36
= 72
Answer(s): 72
