Tom and Carl had 84 markers. After Tom gave 17 markers to Carl. Carl, in return, gave half of his markers to Tom. In the end, Tom had twice as many markers as Carl. How many markers did Tom have at first?
| |
Tom |
Carl |
Total |
| Before |
1 u + 17 |
2 u - 17 |
84 |
| Change 1 |
- 17 |
+ 17 |
|
| After 1 |
1 u |
2 u |
|
| Change 2 |
+ 1 u |
- 1 u |
|
| After 2 |
2 u |
1 u |
84 |
Total number of markers that Tom and Carl had at first and in the end remains unchanged.
Total number of markers
= 2 u + 1 u
= 3 u
1 u = 84 ÷ 3 = 28
Number of markers that Tom had at first
= 1 u + 17
= 28 + 17
= 45
Answer(s): 45
