Elijah and Risa shared $78 equally. How much money must Elijah give to Risa so that Risa will have two times as much money as Elijah?
| |
Elijah |
Risa |
Total |
| Before |
39 |
39 |
78 |
| Change |
- 13 |
+ 13 |
|
| After |
1 u |
2 u |
78 |
Amount that each of them had at first
= 78 ÷ 2
= $39
Amount that Elijah had = 1 u
Amount that Risa had = 2 u
Total amount that Elijah and Risa
= 1 u + 2 u
= 3 u
3 u = 78
1 u = 78 ÷ 3 = 26
Amount that Elijah must give to Risa
= 39 - 26
= $13
Answer(s): $13
