Bryan and Adam have $50.
Bryan has 4 times as much money as Adam.
How much must Bryan give to Adam
so Bryan will have $30 less than Adam?
|
Bryan |
Adam |
Total |
Before |
4 u |
1 u |
5 u |
Change |
- ? |
+ ? |
No change |
After |
$10 |
$10 + $30 |
$50 |
At first
Bryan = 4 u
Adam = 1 u
Total = 1 u + 4 u = 5 u
5 u = 50
1 u = 50 ÷ 5 = 10
Amount that Bryan has at first
= 4 u
= 4 x 10
= $40
For Bryan to have $30 less than Adam in the end, we need to set aside $30 for Adam before the remaining amount is divided into 2.
Amount that Bryan will have in the end
= (50 - 30) ÷ 2
= 20 ÷ 2
= $10
Amount that Bryan gives to Adam
= Amount that Bryan at first - Amount that Bryan has in the end
= 40 - 10
= $30
Answer(s): $30