SOLUTION: Equal amounts are invested at 2%, 7%, and 9% annual interest. If the three investments yield a total of $720 annual interest, find the total investment.

Question 1121685: Equal amounts are invested at 2%, 7%, and 9% annual interest. If the three investments yield a total of $720 annual interest, find the total investment.
Found 2 solutions by solver91311, ikleyn:
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Let represent one-third of the total investment. Then

Solve for , then calculate .

John

My calculator said it, I believe it, that settles it

Answer by ikleyn(52797) (Show Source): You can put this solution on YOUR website!
.
I just solved it yesterday under this link

https://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq.question.1121637.html

https://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq.question.1121637.html

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