Question 186685
Suppose she invested an amount P at 4%, she had invested 2P (ie twice) at 4%
Her returns from both is (4/100)P + (5/100)2P = (4P/100) + (10P/100)
=14P/100 which  is $350
So we can equate this as
14P/100 =350 ; so P = 35000/14 = $2500  
She invested $2500 at 4%
And she invested 2P that is $5000 at 5%
Hope the steps are clear. 
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