Last week, Ivan had a total of 96 black and purple pencils. Two weeks later, he sold
45 of all the black pencils and 24 purple pencils. Now he has the same number of black and purple pencils. How many pencils does he have in the end?
| |
Black |
Purple |
Total |
| Before |
5 u |
1 u + 24 |
6 u + 24 |
| Change |
- 4 u |
- 24 |
|
| After |
1 u |
1 u |
|
Comparing the black
and purple pencils in the end |
1 |
1 |
|
Total number of pencils at first
= 5 u + 1 u + 24
= 6 u + 24
6 u + 24 = 96
6 u = 96 - 24
6 u = 72
1 u = 72 ÷ 6 = 12
Number of pencils that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 12
= 24
Answer(s): 24
