Last week, Dylan had a total of 268 white and silver pens. Two weeks later, he sold
56 of all the white pens and 9 silver pens. Now he has the same number of white and silver pens. How many pens does he have in the end?
| |
White |
Silver |
Total |
| Before |
6 u |
1 u + 9 |
7 u + 9 |
| Change |
- 5 u |
- 9 |
|
| After |
1 u |
1 u |
|
Comparing the white
and silver pens in the end |
1 |
1 |
|
Total number of pens at first
= 6 u + 1 u + 9
= 7 u + 9
7 u + 9 = 268
7 u = 268 - 9
7 u = 259
1 u = 259 ÷ 7 = 37
Number of pens that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 37
= 74
Answer(s): 74
