Nora had $70 less than Dana at first. After Dana and Nora spent an equal amount of money, Nora had
310 as much as Dana. How much money did Nora have left?
| |
Nora |
Dana |
Difference |
| Before |
1 u |
1 u + $70 |
$70 |
| Change |
- 1 |
- 1 |
|
| After |
3 p |
10 p |
7 p |
Difference in the amounts between Dana and Nora
= 10 p - 3 p
= 7 p
Since both Dana and Nora spent an equal amount, the difference in the amounts that Dana and Nora had at first and in the end remains unchanged.
7 p = 70
1 p = 70 ÷ 7 = 10
Amount that Nora had left
= 3 p
= 3 x 10
= $30
Answer(s): $30
