Christian and Sofia shared $42 equally. How much money must Christian give to Sofia so that Sofia will have two times as much money as Christian?
| |
Christian |
Sofia |
Total |
| Before |
21 |
21 |
42 |
| Change |
- 7 |
+ 7 |
|
| After |
1 u |
2 u |
42 |
Amount that each of them had at first
= 42 ÷ 2
= $21
Amount that Christian had = 1 u
Amount that Sofia had = 2 u
Total amount that Christian and Sofia
= 1 u + 2 u
= 3 u
3 u = 42
1 u = 42 ÷ 3 = 14
Amount that Christian must give to Sofia
= 21 - 14
= $7
Answer(s): $7
