Last week, Xavier had a total of 217 green and purple markers. Two weeks later, he sold
45 of all the green markers and bought another 11 purple markers. Now he has the same number of green and purple markers. How many markers does he have in the end?
| |
Green |
Purple |
Total |
| Before |
5 u |
1 u - 11 |
6 u - 11 |
| Change |
- 4 u |
+ 11 |
|
| After |
1 u |
1 u |
|
Comparing the green
and purple markers in the end |
1 |
1 |
|
Total number of markers at first
= 5 u + 1 u - 11
= 6 u - 11
6 u - 11 = 217
6 u = 217 + 11
6 u = 228
1 u = 228 ÷ 6 = 38
Number of markers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 38
= 76
Answer(s): 76
