Cathy and Charlie had the same amount of money at first. After Cathy spent $109 on a wallet and Charlie received $31 from his mother, Charlie had 3 times as much as money as Cathy. How much money did Cathy have at first?
| |
Cathy |
Charlie |
| Before |
1 u + $109 |
3 u - $31 |
| Change |
- $109 |
+ $31 |
| After |
1 u |
3 u |
Cathy and Charlie had the same amount of money at first.
3 u - 31 = 1 u + 109
3 u - 1 u = 109 + 31
2 u = 140
1 u = 140 ÷ 2 = 70
Amount that Cathy had at first
= 1 u + 109
= 70 + 109
= $179
Answer(s): $179
