Last week, Archie had a total of 253 pink and blue pencils. Two weeks later, he sold
34 of all the pink pencils and bought another 22 blue pencils. Now he has the same number of pink and blue pencils. How many pencils does he have in the end?
| |
Pink |
Blue |
Total |
| Before |
4 u |
1 u - 22 |
5 u - 22 |
| Change |
- 3 u |
+ 22 |
|
| After |
1 u |
1 u |
|
Comparing the pink
and blue pencils in the end |
1 |
1 |
|
Total number of pencils at first
= 4 u + 1 u - 22
= 5 u - 22
5 u - 22 = 253
5 u = 253 + 22
5 u = 275
1 u = 275 ÷ 5 = 55
Number of pencils that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 55
= 110
Answer(s): 110
