Yoko had $18 less than Opal at first. After Opal and Yoko spent an equal amount of money, Yoko had
57 as much as Opal. How much money did Yoko have left?
| |
Yoko |
Opal |
Difference |
| Before |
1 u |
1 u + $18 |
$18 |
| Change |
- 1 |
- 1 |
|
| After |
5 p |
7 p |
2 p |
Difference in the amounts between Opal and Yoko
= 7 p - 5 p
= 2 p
Since both Opal and Yoko spent an equal amount, the difference in the amounts that Opal and Yoko had at first and in the end remains unchanged.
2 p = 18
1 p = 18 ÷ 2 = 9
Amount that Yoko had left
= 5 p
= 5 x 9
= $45
Answer(s): $45
