3 children have a total of $4920.
Bryan has $420 more than Adam.
Adam has 2 times as much as Charlie.
- How much does Bryan have?
- How much does Adam have?
- How much does Charlie have?
(a)
Choose the person with least money to be 1 u.
Amount that Charlie has = 1 u
Amount that Adam has = 2 u
Amount that Bryan has = 2 u + 420
Total amount that Bryan, Adam and Charlie
= 1 u + 2 u + 2 u + 420
= 5 u + 420
5 u + 420 = 4920
5 u = 4920 - 420 = 4500
5 u = 4500
1 u = 4500 ÷ 5 = 900
Amount that Bryan has
= 2 u + 420
= 2 x 900 + 420
= 1800 + 420
= $2220
(b)
Amount that Adam has
= 2 u
= $1800
(c)
Amount that Charlie has
= 1 u
= $900
Answer(s): (a) $2220; (b) $1800; (c) $900