Last week, Michael had a total of 198 white and brown pens. Two weeks later, he sold
56 of all the white pens and bought another 5 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 |
6 u |
1 u - 5 |
7 u - 5 |
| Change |
- 5 u |
+ 5 |
|
| After |
1 u |
1 u |
|
Comparing the white
and brown pens in the end |
1 |
1 |
|
Total number of pens at first
= 6 u + 1 u - 5
= 7 u - 5
7 u - 5 = 198
7 u = 198 + 5
7 u = 203
1 u = 203 ÷ 7 = 29
Number of pens that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 29
= 58
Answer(s): 58
