Last week, Vincent had a total of 117 purple and gold markers. Two weeks later, he sold
23 of all the purple markers and bought another 11 gold markers. Now he has the same number of purple and gold markers. How many markers does he have in the end?
| |
Purple |
Gold |
Total |
| Before |
3 u |
1 u - 11 |
4 u - 11 |
| Change |
- 2 u |
+ 11 |
|
| After |
1 u |
1 u |
|
Comparing the purple
and gold markers in the end |
1 |
1 |
|
Total number of markers at first
= 3 u + 1 u - 11
= 4 u - 11
4 u - 11 = 117
4 u = 117 + 11
4 u = 128
1 u = 128 ÷ 4 = 32
Number of markers that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 32
= 64
Answer(s): 64
