Last week, George had a total of 209 black and blue markers. Two weeks later, he sold
34 of all the black markers and bought another 26 blue markers. Now he has the same number of black and blue markers. How many markers does he have in the end?
| |
Black |
Blue |
Total |
| Before |
4 u |
1 u - 26 |
5 u - 26 |
| Change |
- 3 u |
+ 26 |
|
| After |
1 u |
1 u |
|
Comparing the black
and blue markers in the end |
1 |
1 |
|
Total number of markers at first
= 4 u + 1 u - 26
= 5 u - 26
5 u - 26 = 209
5 u = 209 + 26
5 u = 235
1 u = 235 ÷ 5 = 47
Number of markers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 47
= 94
Answer(s): 94
