Mary had $36 more than Kylie at first. After Mary and Kylie spent an equal amount of money, Kylie had
710 as much as Mary. How much money did Mary have left?
| |
Mary |
Kylie |
Difference |
| Before |
1 u + $36 |
1 u |
$36 |
| Change |
- 1 |
- 1 |
|
| After |
10 p |
7 p |
3 p |
Difference in the amounts between Mary and Kylie
= 10 p - 7 p
= 3 p
Since both Mary and Kylie spent an equal amount, the difference in the amounts that Mary and Kylie had at first and in the end remains unchanged.
3 p = 36
1 p = 36 ÷ 3 = 12
Amount that Mary had left
= 10 p
= 10 x 12
= $120
Answer(s): $120
