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Answer

If Cindy had $ 10u, Adrian had $ ( 10u * 0.6) = $ 6u. 

Now if Cindy gave Adrian $24.80, Cindy was left with $ ( 10u – 24.8) and Adrian had $ ( 6u + 24.8).

10u -24.8 = 6u + 24.8

4u = 49.6

u = 12.4

10u = 124

So Cindy had $124 at first.

 

Check: 124* 0.6 = 74.4

124 – 84.4 = 49.6

49.6/2 = 29.8 checked

 

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