SOLUTION: Equal amounts are invested at 6%, 7%, and 9% annual interest. If the three investments yield a total of $814 annual interest, find the total investment.

Question 564881: Equal amounts are invested at 6%, 7%, and 9% annual interest. If the three investments yield a total of $814 annual interest, find the total investment.

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Equal amounts are invested at 6%, 7%, and 9% annual interest.
If the three investments yield a total of $814 annual interest, find the total investment.
:
Let x = amt invested at each interest
;
.06x + .07x + .09x = 814
.22x = 814
x =
x = $3700 invested at each
therefore
3(3700) = $11,100 is the total
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