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college alg help!

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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.

so I let the three investment amounts be E, S, and N



I don't know how to figure out answer past that

  • college alg help! -

    Since E = 2.25 S (from the last equation), you can eliminate E from the other two equations. Then solve two equations in two unknows (S and N).

    Follow the advice that BobPursley gave to Samantha.

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