The ratio of Liam's money to Zeph's money is 5 : 13. If Zeph has $39, how much must he give to Liam so both will have the equal amount of money?
| |
Liam |
Zeph |
Total |
| Before |
5 u |
13 u |
18 u |
| Change |
+ 4 u |
- 4 u |
|
| After |
9 u |
9 u |
18 u |
Comparing Liam and
Zeph in the end |
1 |
1 |
|
Amount that Zeph has at first = 13 u
13 u = 39
1 u = 39 ÷ 13 = 3
Total amount that Zeph and Liam have
= 5 u + 13 u
= 18 u
Amount that each of them will have in the end
= 18 u ÷ 2
= 9 u
Amount that Zeph must give to Liam
= 9 u - 5 u
= 4 u
= 4 x 3
= $12
Answer(s): $12
