Last week, Bryan had a total of 62 white and brown pens. Two weeks later, he sold
23 of all the white pens and 18 brown pens. Now he has the same number of white and brown pens. How many pens does he have in the end?
| |
White |
Brown |
Total |
| Before |
3 u |
1 u + 18 |
4 u + 18 |
| Change |
- 2 u |
- 18 |
|
| After |
1 u |
1 u |
|
Comparing the white
and brown pens in the end |
1 |
1 |
|
Total number of pens at first
= 3 u + 1 u + 18
= 4 u + 18
4 u + 18 = 62
4 u = 62 - 18
4 u = 44
1 u = 44 ÷ 4 = 11
Number of pens that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 11
= 22
Answer(s): 22
