Kylie had $21 more than Kimberly at first. After Kylie and Kimberly spent an equal amount of money, Kimberly had
710 as much as Kylie. How much money did Kylie have left?
| |
Kylie |
Kimberly |
Difference |
| Before |
1 u + $21 |
1 u |
$21 |
| Change |
- 1 |
- 1 |
|
| After |
10 p |
7 p |
3 p |
Difference in the amounts between Kylie and Kimberly
= 10 p - 7 p
= 3 p
Since both Kylie and Kimberly spent an equal amount, the difference in the amounts that Kylie and Kimberly had at first and in the end remains unchanged.
3 p = 21
1 p = 21 ÷ 3 = 7
Amount that Kylie had left
= 10 p
= 10 x 7
= $70
Answer(s): $70
