Bryan has 4 times as much money as Adam.
After Bryan has spent $80,
he has 2 times as much money as Adam.
- How much money does Adam have?
- How much money does Bryan have in the end?
- How much money do they have at first?
- How much do they have in the end?
|
Bryan |
Adam |
Before |
4 u |
1 u |
Change |
- $80 |
No change |
After |
2 u |
1 u |
(a)
The amount that Adam has at first and in the end remains unchanged.
Make the amount that Adam has the same using LCM of 1 and 1.
LCM of 1 and 1 = 1
Amount that Bryan has spent
= 4 u - 2 u
= 2 u
2 u = 80
1 u = 80 ÷ 2 = 40
Amount that Adam has
= 1 u
= $40
(b)
Amount that Bryan has in the end
= 2 u
= 2 x 40
= $80
(c)
Amount that they have at first
= 4 u + 1 u
= 5 u
= 5 x 40
= $200
(d)
Amount that they have in the end
= 2 u + 1 u
= 3 u
= 3 x 40
= $120
Answer(s): (a) $40; (b) $80; (c) $200; (d) $120