Erika had $20 more than Barbara at first. Barbara spent
12 of her money and Erika spent
35 of her money. Given that they had equal amount of money left, how many much did Barbara have at first?
| |
Erika |
Barbara |
More |
Before |
2x2 =
2 u |
5x1 =
5 u |
1 u |
Change |
- 1x2 =
- 2 u |
- 3x1 =
- 3 u |
|
After |
1x2 =
2 u |
2x1 =
2 u |
|
Fraction of money that Barbara had left
= 1 -
12 =
12 Fraction of money that Erika had left
= 1 -
35 =
25 The amount that Erika and Barbara had left is the same. Make the amount that Erika and Barbara had left is the same. LCM of 1 and 2 is 2.
Amount that Barbara had at first = 2 u
Amount that Erika had at first = 5 u
Amount that Erika had more than Barbara at first
= 5 u - 2 u
= 1 u
= $20
Amount that Barbara had at first
= 2 u
= 2 x 20
= $40
Answer(s): $40
