Last week, Ben had a total of 57 yellow and white markers. Two weeks later, he sold
34 of all the yellow markers and bought another 3 white markers. Now he has the same number of yellow and white markers. How many markers does he have in the end?
| |
Yellow |
White |
Total |
| Before |
4 u |
1 u - 3 |
5 u - 3 |
| Change |
- 3 u |
+ 3 |
|
| After |
1 u |
1 u |
|
Comparing the yellow
and white markers in the end |
1 |
1 |
|
Total number of markers at first
= 4 u + 1 u - 3
= 5 u - 3
5 u - 3 = 57
5 u = 57 + 3
5 u = 60
1 u = 60 ÷ 5 = 12
Number of markers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 12
= 24
Answer(s): 24
