college alg HELP!
posted by samantha .
I cannot figure a way to do this problem:
An investment of $98,000 was made by a business club. The investment was split into three parts and lasted for one year. The first part of the investment earned 8% interest, the second 6%, and third 9%. The total interest from the investments was $7560. The interest from the first investment was 3 times the interest from the second. Find the amounts of the three parts of the investment.

let the three investment amounts be E, S, and N
E+S+N=98000
7500=E*.08+S*.06+N*.09
E*.08=3*S*.06
Three equations, three unknowns, I assume you can put the icing on. 
I know how to set it up but I cannot get the three solutions right. I solve by addition and what not but cann't ever get the right answer!
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