Last week, Tom had a total of 175 green and black markers. Two weeks later, he sold
34 of all the green markers and 10 black markers. Now he has the same number of green and black markers. How many markers does he have in the end?
| |
Green |
Black |
Total |
| Before |
4 u |
1 u + 10 |
5 u + 10 |
| Change |
- 3 u |
- 10 |
|
| After |
1 u |
1 u |
|
Comparing the green
and black markers in the end |
1 |
1 |
|
Total number of markers at first
= 4 u + 1 u + 10
= 5 u + 10
5 u + 10 = 175
5 u = 175 - 10
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
