Last week, Brandon had a total of 142 brown and blue markers. Two weeks later, he sold
34 of all the brown markers and bought another 23 blue markers. Now he has the same number of brown and blue markers. How many markers does he have in the end?
| |
Brown |
Blue |
Total |
| Before |
4 u |
1 u - 23 |
5 u - 23 |
| Change |
- 3 u |
+ 23 |
|
| After |
1 u |
1 u |
|
Comparing the brown
and blue markers in the end |
1 |
1 |
|
Total number of markers at first
= 4 u + 1 u - 23
= 5 u - 23
5 u - 23 = 142
5 u = 142 + 23
5 u = 165
1 u = 165 ÷ 5 = 33
Number of markers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 33
= 66
Answer(s): 66
