Last week, Oscar had a total of 165 white and red staplers. Two weeks later, he sold
34 of all the white staplers and bought another 25 red staplers. Now he has the same number of white and red staplers. How many staplers does he have in the end?
| |
White |
Red |
Total |
| Before |
4 u |
1 u - 25 |
5 u - 25 |
| Change |
- 3 u |
+ 25 |
|
| After |
1 u |
1 u |
|
Comparing the white
and red staplers in the end |
1 |
1 |
|
Total number of staplers at first
= 4 u + 1 u - 25
= 5 u - 25
5 u - 25 = 165
5 u = 165 + 25
5 u = 190
1 u = 190 ÷ 5 = 38
Number of staplers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 38
= 76
Answer(s): 76
