Mary had $14 less than Marion at first. After Marion and Mary spent an equal amount of money, Mary had
310 as much as Marion. How much money did Mary have left?
| |
Mary |
Marion |
Difference |
| Before |
1 u |
1 u + $14 |
$14 |
| Change |
- 1 |
- 1 |
|
| After |
3 p |
10 p |
7 p |
Difference in the amounts between Marion and Mary
= 10 p - 3 p
= 7 p
Since both Marion and Mary spent an equal amount, the difference in the amounts that Marion and Mary had at first and in the end remains unchanged.
7 p = 14
1 p = 14 ÷ 7 = 2
Amount that Mary had left
= 3 p
= 3 x 2
= $6
Answer(s): $6
