Last week, Tim had a total of 204 purple and red pens. Two weeks later, he sold
45 of all the purple pens and 24 red pens. Now he has the same number of purple and red pens. How many pens does he have in the end?
| |
Purple |
Red |
Total |
| Before |
5 u |
1 u + 24 |
6 u + 24 |
| Change |
- 4 u |
- 24 |
|
| After |
1 u |
1 u |
|
Comparing the purple
and red pens in the end |
1 |
1 |
|
Total number of pens at first
= 5 u + 1 u + 24
= 6 u + 24
6 u + 24 = 204
6 u = 204 - 24
6 u = 180
1 u = 180 ÷ 6 = 30
Number of pens that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 30
= 60
Answer(s): 60
