Oliver had $52.40 more than Michael. After Michael had spent
57 of his money, Oliver had $76.90 more than Michael. How much money did Oliver have at first?
|
Oliver |
Michael |
More |
Before |
7 u + $52.40 |
7 u |
$52.40 |
Change |
|
- 5 u |
|
After |
7 u + $52.40 |
2 u |
5 u + $52.40 |
Oliver had $76.90 more than Michael in the end.
7 u + 52.40 - 2 u = 76.90
5 u + 52.40 = 76.90
5 u = 76.90 - 52.40
5 u = 24.50
1 u = 24.50 ÷ 5 = 4.90
Amount that Oliver had at first
= 7 u + 52.40
= 7 x 4.90 + 52.40
= 34.30 + 52.40
= $86.70
Answer(s): $86.70