Gabby and Gillian had equal amount of money. Each day, Gabby spent $9 and Gillian spent $17. When Gabby had $80 left, Gillian had
35 as much money left as Gabby. How much money did the two girls have at first?
| |
Gabby |
Gillian |
| Before |
9 u + 80 |
17 u + 48 |
| Change |
- 9 u |
- 17 u |
| After |
$80 |
$48 |
Amount that Gillian had left
=
35 x 80
= $48
The amount that Gabby and Gillian had at first is the same.
17 u + 48 = 9 u + 80
17 u - 9 u = 80 - 48
8 u = 32
1 u = 32 ÷ 8 = 4
Amount that Gabby had at first
= 9 u + 80
= 9 x 4 + 80
= 36 + 80
= $116
Total amount that both girls had at first
= 2 x 116
= $232
Answer(s): $232
