Mrs Soh gave Sarah and Linda some money each on Thursday. On Friday, Sarah gave
16 of the amount she had to Linda. On Saturday, Linda gave
15 of the amount she had to Sarah. In the end, Sarah had $34 and Linda had $16. How much did Linda had more than Sarah at first?
| |
Sarah |
Linda |
Total |
| Before 1 |
6 u |
? |
$50 |
| Change 1 |
- 1 u |
+ 1 u |
|
| After 1 |
5 u |
5 p |
$50 |
| Before 2 |
$34 - 1 p |
5 p |
$50 |
| Change 2 |
+ 1 p |
- 1 p |
|
After 2 |
$34 |
4 p
($16) |
$50 |
Amount that Linda had in the end = 4 p
4 p = 16
1 p = 16 ÷ 4 = 4
Working backwards.
Amount that Sarah had after giving to Linda on Friday
= 34 - 1 p
= 34 - 4
= $30
5 u = 30
1 u = 30 ÷ 5 = 6
Amount that Sarah had at first
= 6 u
= 6 x 6
= $36
Total amount that Sarah and Linda had
= 34 + 16
= $50
Amount that Linda had at first
= 50 - 36
= $14
Amount that Sarah had more than Linda
= 36 - 14
= $22
Answer(s): $22
