Dylan had 3 times as many green markers as gold markers. After giving away 3 green markers and buying another 5 gold markers, he had an equal number of green and gold markers. How many green markers did Dylan have at first?
| |
Green markers |
Gold markers |
| Before |
3 u |
1 u |
| Change |
- 3 |
+ 5 |
| After |
3 u - 3 |
1 u + 5 |
The number of green and gold markers is the same in the end.
3 u - 3 = 1 u + 5
3 u - 1 u = 5 + 3
2 u = 3 + 5
2 u = 8
1 u = 8 ÷ 2 = 4
Number of green markers that Dylan had at first
= 3 u
= 3 x 4
= 12
Answer(s): 12
