Shannon and David went shopping with a total of $30. After Shannon spent
14 of her money and David spent
12 of his money, they each had an equal amount of money left. How much money did they spend altogether?
| |
Shannon |
David |
Total |
Before |
4 u |
2x3 =
6 u |
$30 |
Change |
- 1 u |
- 1x3 =
- 3 u |
|
After |
3 u |
1x3 =
3 u |
|
The amount that Shannon and David each had in the end is the same. Make the amount that each had in the end the same. LCM of 3 and 1 is 3.
Total amount that Shannon and David had at first
= 4 u + 6 u
= 10 u
10 u = 30
1 u = 30 ÷ 10 = 3
Total amount that Shannon and David spent
= 1 u + 3 u
= 4 u
= 4 x 3
= $12
Answer(s): $12
