Last week, Archie had a total of 46 blue and red staplers. Two weeks later, he sold
23 of all the blue staplers and bought another 10 red staplers. Now he has the same number of blue and red staplers. How many staplers does he have in the end?
| |
Blue |
Red |
Total |
| Before |
3 u |
1 u - 10 |
4 u - 10 |
| Change |
- 2 u |
+ 10 |
|
| After |
1 u |
1 u |
|
Comparing the blue
and red staplers in the end |
1 |
1 |
|
Total number of staplers at first
= 3 u + 1 u - 10
= 4 u - 10
4 u - 10 = 46
4 u = 46 + 10
4 u = 56
1 u = 56 ÷ 4 = 14
Number of staplers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 14
= 28
Answer(s): 28
