Tina had $20 less than Gwen at first. After Gwen and Tina spent an equal amount of money, Tina had
57 as much as Gwen. How much money did Tina have left?
| |
Tina |
Gwen |
Difference |
| Before |
1 u |
1 u + $20 |
$20 |
| Change |
- 1 |
- 1 |
|
| After |
5 p |
7 p |
2 p |
Difference in the amounts between Gwen and Tina
= 7 p - 5 p
= 2 p
Since both Gwen and Tina spent an equal amount, the difference in the amounts that Gwen and Tina had at first and in the end remains unchanged.
2 p = 20
1 p = 20 ÷ 2 = 10
Amount that Tina had left
= 5 p
= 5 x 10
= $50
Answer(s): $50
