Tammy had $30 less than Roshel at first. After Roshel and Tammy spent an equal amount of money, Tammy had
710 as much as Roshel. How much money did Tammy have left?
| |
Tammy |
Roshel |
Difference |
| Before |
1 u |
1 u + $30 |
$30 |
| Change |
- 1 |
- 1 |
|
| After |
7 p |
10 p |
3 p |
Difference in the amounts between Roshel and Tammy
= 10 p - 7 p
= 3 p
Since both Roshel and Tammy spent an equal amount, the difference in the amounts that Roshel and Tammy had at first and in the end remains unchanged.
3 p = 30
1 p = 30 ÷ 3 = 10
Amount that Tammy had left
= 7 p
= 7 x 10
= $70
Answer(s): $70
