2 piece of $10 notes will exchange for 10 piece of $2 notescindy28 wrote:need help with the following questions

Q2. At first Edwin had some $10 and $2 notes in the ratio of 3 : 8. After exchanging 2 $10 notes for $2 notes, the ratio of $10 to $2 becomes 1 : 3. How much did money did Edwin have at first?

Code: Select all

```
$10 : $2
3u : 8u
-2 +10
1p : 3p
```

8u + 10 = 3p

9u - 6 = 3p

8u + 10 = 9u - 6

u = 16

At 1st,

Pieces of $10 notes = 3u = 48

Pieces of $2 notes = 8u = 128

Value of $10 notes = $480

Value of $2 notes = $256

Total he had at first = $480+$256 = $736 ##