Last week, Charlie had a total of 261 yellow and blue staplers. Two weeks later, he sold
45 of all the yellow staplers and bought another 15 blue staplers. Now he has the same number of yellow and blue staplers. How many staplers does he have in the end?
| |
Yellow |
Blue |
Total |
| Before |
5 u |
1 u - 15 |
6 u - 15 |
| Change |
- 4 u |
+ 15 |
|
| After |
1 u |
1 u |
|
Comparing the yellow
and blue staplers in the end |
1 |
1 |
|
Total number of staplers at first
= 5 u + 1 u - 15
= 6 u - 15
6 u - 15 = 261
6 u = 261 + 15
6 u = 276
1 u = 276 ÷ 6 = 46
Number of staplers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 46
= 92
Answer(s): 92
