Last week, Rael had a total of 78 yellow and green markers. Two weeks later, he sold
23 of all the yellow markers and 10 green markers. Now he has the same number of yellow and green markers. How many markers does he have in the end?
| |
Yellow |
Green |
Total |
| Before |
3 u |
1 u + 10 |
4 u + 10 |
| Change |
- 2 u |
- 10 |
|
| After |
1 u |
1 u |
|
Comparing the yellow
and green markers in the end |
1 |
1 |
|
Total number of markers at first
= 3 u + 1 u + 10
= 4 u + 10
4 u + 10 = 78
4 u = 78 - 10
4 u = 68
1 u = 68 ÷ 4 = 17
Number of markers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 17
= 34
Answer(s): 34
