Bryan has 8 times as much money as Charlie.
After Bryan has spent $40,
he has 6 times as much money as Charlie.
- How much money does Charlie 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 |
Charlie |
Before |
8 u |
1 u |
Change |
- $40 |
No change |
After |
6 u |
1 u |
(a)
The amount that Charlie has at first and in the end remains unchanged.
Make the amount that Charlie has the same using LCM of 1 and 1.
LCM of 1 and 1 = 1
Amount that Bryan has spent
= 8 u - 6 u
= 2 u
2 u = 40
1 u = 40 ÷ 2 = 20
Amount that Charlie has
= 1 u
= $20
(b)
Amount that Bryan has in the end
= 6 u
= 6 x 20
= $120
(c)
Amount that they have at first
= 8 u + 1 u
= 9 u
= 9 x 20
= $180
(d)
Amount that they have in the end
= 6 u + 1 u
= 7 u
= 7 x 20
= $140
Answer(s): (a) $20; (b) $120; (c) $180; (d) $140