Opal and Gabby had equal amount of money. Each day, Opal spent $20 and Gabby spent $22. When Opal had $120 left, Gabby had
35 as much money left as Opal. How much money did the two girls have at first?
| |
Opal |
Gabby |
| Before |
20 u + 120 |
22 u + 72 |
| Change |
- 20 u |
- 22 u |
| After |
$120 |
$72 |
Amount that Gabby had left
=
35 x 120
= $72
The amount that Opal and Gabby had at first is the same.
22 u + 72 = 20 u + 120
22 u - 20 u = 120 - 72
2 u = 48
1 u = 48 ÷ 2 = 24
Amount that Opal had at first
= 20 u + 120
= 20 x 24 + 120
= 480 + 120
= $600
Total amount that both girls had at first
= 2 x 600
= $1200
Answer(s): $1200
