David and Dana had equal amount of money. David spent
12 of his money on a skirt while Dana spent
23 of her money on a shirt. Given that Dana spent $2 more than David, how much did David have at first?
| |
David |
Dana |
| Before |
2x3 =
6 u |
3x2 =
6 u |
| Change |
- 1x3 =
- 3 u |
- 2x2 =
- 4 u |
| After |
1x3 =
3 u |
1x2 =
2 u |
The amount that David and Dana had at first is the same. Make the amount that David and Dana had at first the same. LCM of 2 and 3 is 6.
Amount that Dana spent more than David
= 4 u - 3 u
= 1 u
1 u = 2
Amount that David had at first
= 6 u
= 6 x 2
= $12
Answer(s): $12
