Homework Help: college alg HELP!

Posted by samantha on Thursday, November 18, 2010 at 1:12pm.

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.

college alg HELP! - bobpursley, Thursday, November 18, 2010 at 1:26pm
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.
college alg HELP! - samantha, Thursday, November 18, 2010 at 1:35pm
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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