Penelope had $42 less than Natalie at first. After Natalie and Penelope spent an equal amount of money, Penelope had
310 as much as Natalie. How much money did Penelope have left?
| |
Penelope |
Natalie |
Difference |
| Before |
1 u |
1 u + $42 |
$42 |
| Change |
- 1 |
- 1 |
|
| After |
3 p |
10 p |
7 p |
Difference in the amounts between Natalie and Penelope
= 10 p - 3 p
= 7 p
Since both Natalie and Penelope spent an equal amount, the difference in the amounts that Natalie and Penelope had at first and in the end remains unchanged.
7 p = 42
1 p = 42 ÷ 7 = 6
Amount that Penelope had left
= 3 p
= 3 x 6
= $18
Answer(s): $18
