Last week, Reggie had a total of 170 green and grey files. Two weeks later, he sold
23 of all the green files and bought another 26 grey files. Now he has the same number of green and grey files. How many files does he have in the end?
| |
Green |
Grey |
Total |
| Before |
3 u |
1 u - 26 |
4 u - 26 |
| Change |
- 2 u |
+ 26 |
|
| After |
1 u |
1 u |
|
Comparing the green
and grey files in the end |
1 |
1 |
|
Total number of files at first
= 3 u + 1 u - 26
= 4 u - 26
4 u - 26 = 170
4 u = 170 + 26
4 u = 196
1 u = 196 ÷ 4 = 49
Number of files that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 49
= 98
Answer(s): 98
