Last week, Harry had a total of 257 blue and purple staplers. Two weeks later, he sold
34 of all the blue staplers and 7 purple staplers. Now he has the same number of blue and purple staplers. How many staplers does he have in the end?
| |
Blue |
Purple |
Total |
| Before |
4 u |
1 u + 7 |
5 u + 7 |
| Change |
- 3 u |
- 7 |
|
| After |
1 u |
1 u |
|
Comparing the blue
and purple staplers in the end |
1 |
1 |
|
Total number of staplers at first
= 4 u + 1 u + 7
= 5 u + 7
5 u + 7 = 257
5 u = 257 - 7
5 u = 250
1 u = 250 ÷ 5 = 50
Number of staplers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 50
= 100
Answer(s): 100
