Gabby and Winnie had equal amount of money. Each day, Gabby spent $3 and Winnie spent $13. When Gabby had $105 left, Winnie had
17 as much money left as Gabby. How much money did the two girls have at first?
| |
Gabby |
Winnie |
| Before |
3 u + 105 |
13 u + 15 |
| Change |
- 3 u |
- 13 u |
| After |
$105 |
$15 |
Amount that Winnie had left
=
17 x 105
= $15
The amount that Gabby and Winnie had at first is the same.
13 u + 15 = 3 u + 105
13 u - 3 u = 105 - 15
10 u = 90
1 u = 90 ÷ 10 = 9
Amount that Gabby had at first
= 3 u + 105
= 3 x 9 + 105
= 27 + 105
= $132
Total amount that both girls had at first
= 2 x 132
= $264
Answer(s): $264
