Last week, Bobby had a total of 154 black and blue staplers. Two weeks later, he sold
23 of all the black staplers and 22 blue staplers. Now he has the same number of black and blue staplers. How many staplers does he have in the end?
| |
Black |
Blue |
Total |
| Before |
3 u |
1 u + 22 |
4 u + 22 |
| Change |
- 2 u |
- 22 |
|
| After |
1 u |
1 u |
|
Comparing the black
and blue staplers in the end |
1 |
1 |
|
Total number of staplers at first
= 3 u + 1 u + 22
= 4 u + 22
4 u + 22 = 154
4 u = 154 - 22
4 u = 132
1 u = 132 ÷ 4 = 33
Number of staplers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 33
= 66
Answer(s): 66
