Last week, Sean had a total of 193 grey and purple staplers. Two weeks later, he sold
45 of all the grey staplers and bought another 11 purple staplers. Now he has the same number of grey and purple staplers. How many staplers does he have in the end?
| |
Grey |
Purple |
Total |
| Before |
5 u |
1 u - 11 |
6 u - 11 |
| Change |
- 4 u |
+ 11 |
|
| After |
1 u |
1 u |
|
Comparing the grey
and purple staplers in the end |
1 |
1 |
|
Total number of staplers at first
= 5 u + 1 u - 11
= 6 u - 11
6 u - 11 = 193
6 u = 193 + 11
6 u = 204
1 u = 204 ÷ 6 = 34
Number of staplers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 34
= 68
Answer(s): 68
