Gabby and Pamela had equal amount of money. Each day, Gabby spent $17 and Pamela spent $20. When Gabby had $102 left, Pamela had
12 as much money left as Gabby. How much money did the two girls have at first?
| |
Gabby |
Pamela |
| Before |
17 u + 102 |
20 u + 51 |
| Change |
- 17 u |
- 20 u |
| After |
$102 |
$51 |
Amount that Pamela had left
=
12 x 102
= $51
The amount that Gabby and Pamela had at first is the same.
20 u + 51 = 17 u + 102
20 u - 17 u = 102 - 51
3 u = 51
1 u = 51 ÷ 3 = 17
Amount that Gabby had at first
= 17 u + 102
= 17 x 17 + 102
= 289 + 102
= $391
Total amount that both girls had at first
= 2 x 391
= $782
Answer(s): $782
