Sabrina and Abi had equal amount of money. Each day, Sabrina spent $13 and Abi spent $18. When Sabrina had $100 left, Abi had
35 as much money left as Sabrina. How much money did the two girls have at first?
| |
Sabrina |
Abi |
| Before |
13 u + 100 |
18 u + 60 |
| Change |
- 13 u |
- 18 u |
| After |
$100 |
$60 |
Amount that Abi had left
=
35 x 100
= $60
The amount that Sabrina and Abi had at first is the same.
18 u + 60 = 13 u + 100
18 u - 13 u = 100 - 60
5 u = 40
1 u = 40 ÷ 5 = 8
Amount that Sabrina had at first
= 13 u + 100
= 13 x 8 + 100
= 104 + 100
= $204
Total amount that both girls had at first
= 2 x 204
= $408
Answer(s): $408
