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