Question 1164249
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We know two key circumstances: the ratio of the rates is {{{0.09/0.03}}} = 3  and the earned interests are the same.


It means that the 3% amount is three times as big as the 9% account.


So, let the accounts are x and 3x, respectively.


Then x + 3x = 10000  dollars,  hence,  x is $2500.


<U>ANSWER</U>.  $2500 invested at 9% and the rest,  $7500, is invested at 3%.
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Solved.