Charlie had $71.70 more than John. After John had spent
67 of his money, Charlie had $120.30 more than John. How much money did Charlie have at first?
|
Charlie |
John |
More |
Before |
7 u + $71.70 |
7 u |
$71.70 |
Change |
|
- 6 u |
|
After |
7 u + $71.70 |
1 u |
6 u + $71.70 |
Charlie had $120.30 more than John in the end.
7 u + 71.70 - 1 u = 120.30
6 u + 71.70 = 120.30
6 u = 120.30 - 71.70
6 u = 48.60
1 u = 48.60 ÷ 6 = 8.10
Amount that Charlie had at first
= 7 u + 71.70
= 7 x 8.10 + 71.70
= 56.70 + 71.70
= $128.40
Answer(s): $128.40