Charlie had $42 more than Erika. After Erika spent
13 of her money, Charlie had five times as much money as Erika. How much money did Charlie have at first?
| |
Charlie |
Erika |
| Before |
10 u |
3 u |
| Change |
|
- 1 u |
| After |
10 u |
2 u |
Amount that Charlie had in the end
= 5 x 2 u
= 10 u
If Erika had another $42 at first, the amounts that Charlie and Erika each had at first will be the same.
10 u = 3 u + 42
10 u - 3 u = 42
7 u = 42
1 u = 42 ÷ 7 = 6
Amount Charlie had at first
= 10 u
= 10 x 6
= $60
Answer(s): $60
