Question 284705
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Karen Walsh has twice as much money invested at 5% simple interest as she does at 4%. 
If her yearly income from these two investments is $350, how much does she have invested at each rate.
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        In the post by @mananth, the condition is interpreted incorrectly.
        As a consequence to it, the setup equation is not adequate to the problem, 
        as well as the solution and the answer.


        I came to bring a correct solution.



let the amount invested at 4% be x
The amount invested at 5%i s 2x dollars
The yearly interest obtained is 350 dollars.
0.04x + 0.05*(2x) = 350
0.04x + 0.1x = 350
0.14x = 350
x = 350/0.14
x = 2500 which is the amount invested at 4%
2*2500 = 5000 dollars is the amount invested at 5%


<U>CHECK</U>.  &nbsp;&nbsp;&nbsp;&nbsp;0.04*2500 + 0.05*5000 = 350 dollars.  &nbsp;&nbsp;&nbsp;&nbsp;! Precisely correct !


Solved correctly.