Gwen had $18 less than Sarah at first. After Sarah and Gwen spent an equal amount of money, Gwen had
47 as much as Sarah. How much money did Gwen have left?
|
Gwen |
Sarah |
Difference |
Before |
1 u |
1 u + $18 |
$18 |
Change |
- 1 |
- 1 |
|
After |
4 p |
7 p |
3 p |
Difference in the amounts between Sarah and Gwen
= 7 p - 4 p
= 3 p
Since both Sarah and Gwen spent an equal amount, the difference in the amounts that Sarah and Gwen had at first and in the end remains unchanged.
3 p = 18
1 p = 18 ÷ 3 = 6
Amount that Gwen had left
= 4 p
= 4 x 6
= $24
Answer(s): $24