Last week, Glen had a total of 417 blue and grey markers. Two weeks later, he sold
56 of all the blue markers and 18 grey markers. Now he has the same number of blue and grey markers. How many markers does he have in the end?
|
Blue |
Grey |
Total |
Before |
6 u |
1 u + 18 |
7 u + 18 |
Change |
- 5 u |
- 18 |
|
After |
1 u |
1 u |
|
Comparing the blue and grey markers in the end |
1 |
1 |
|
Total number of markers at first
= 6 u + 1 u + 18
= 7 u + 18
7 u + 18 = 417
7 u = 417 - 18
7 u = 399
1 u = 399 ÷ 7 = 57
Number of markers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 57
= 114
Answer(s): 114