Paul and Zane had a total of 84 buttons. Zane had half as many buttons as Paul. How many buttons must Paul give to Zane so they have an equal number of buttons?
|
Paul |
Zane |
Total |
Before |
2 u |
1 u |
84 |
Change |
- ? |
+ ? |
|
After |
1 |
1 |
|
Total number of buttons at first = 3 u
1 u = 84 ÷ 3 = 28
Paul and Zane have an equal number of buttons in the end.
Number of buttons that Zane has in the end
= 84 ÷ 2
= 42
Number of buttons that Paul must give to Zane
= 42 - 28
= 14
Answer(s): 14