Last week, Japheth had a total of 232 grey and white files. Two weeks later, he sold
34 of all the grey files and bought another 8 white files. Now he has the same number of grey and white files. How many files does he have in the end?
| |
Grey |
White |
Total |
| Before |
4 u |
1 u - 8 |
5 u - 8 |
| Change |
- 3 u |
+ 8 |
|
| After |
1 u |
1 u |
|
Comparing the grey
and white files in the end |
1 |
1 |
|
Total number of files at first
= 4 u + 1 u - 8
= 5 u - 8
5 u - 8 = 232
5 u = 232 + 8
5 u = 240
1 u = 240 ÷ 5 = 48
Number of files that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 48
= 96
Answer(s): 96
