Gwen had $49 less than Zoe at first. After Zoe and Gwen spent an equal amount of money, Gwen had
310 as much as Zoe. How much money did Gwen have left?
| |
Gwen |
Zoe |
Difference |
| Before |
1 u |
1 u + $49 |
$49 |
| Change |
- 1 |
- 1 |
|
| After |
3 p |
10 p |
7 p |
Difference in the amounts between Zoe and Gwen
= 10 p - 3 p
= 7 p
Since both Zoe and Gwen spent an equal amount, the difference in the amounts that Zoe and Gwen had at first and in the end remains unchanged.
7 p = 49
1 p = 49 ÷ 7 = 7
Amount that Gwen had left
= 3 p
= 3 x 7
= $21
Answer(s): $21
