Last week, Bryan had a total of 353 pink and white files. Two weeks later, he sold
56 of all the pink files and 3 white files. Now he has the same number of pink and white files. How many files does he have in the end?
| |
Pink |
White |
Total |
| Before |
6 u |
1 u + 3 |
7 u + 3 |
| Change |
- 5 u |
- 3 |
|
| After |
1 u |
1 u |
|
Comparing the pink
and white files in the end |
1 |
1 |
|
Total number of files at first
= 6 u + 1 u + 3
= 7 u + 3
7 u + 3 = 353
7 u = 353 - 3
7 u = 350
1 u = 350 ÷ 7 = 50
Number of files that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 50
= 100
Answer(s): 100
