Last week, Daniel had a total of 266 white and black staplers. Two weeks later, he sold
34 of all the white staplers and 11 black staplers. Now he has the same number of white and black staplers. How many staplers does he have in the end?
| |
White |
Black |
Total |
| Before |
4 u |
1 u + 11 |
5 u + 11 |
| Change |
- 3 u |
- 11 |
|
| After |
1 u |
1 u |
|
Comparing the white
and black staplers in the end |
1 |
1 |
|
Total number of staplers at first
= 4 u + 1 u + 11
= 5 u + 11
5 u + 11 = 266
5 u = 266 - 11
5 u = 255
1 u = 255 ÷ 5 = 51
Number of staplers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 51
= 102
Answer(s): 102
